I would like to receive emails from you about product information and offers from The Fool and its business partners. Each of these emails will provide a link to unsubscribe from future emails. More information about how The Fool collects, stores, and handles personal data is available in its Privacy Statement. “This Stock Could Be Like Buying Amazon in 1997” Renowned stock-picker Mark Rogers and his analyst team at The Motley Fool UK have named 6 shares that they believe UK investors should consider buying NOW.So if you’re looking for more stock ideas to try and best position your portfolio today, then it might be a good day for you. Because we’re offering a full 33% off your first year of membership to our flagship share-tipping service, backed by our ‘no quibbles’ 30-day subscription fee refund guarantee. 5 ‘monster’ investment themes I’m betting on in 2021 Enter Your Email Address Simply click below to discover how you can take advantage of this. See all posts by Edward Sheldon, CFA I’m sure you’ll agree that’s quite the statement from Motley Fool Co-Founder Tom Gardner.But since our US analyst team first recommended shares in this unique tech stock back in 2016, the value has soared.What’s more, we firmly believe there’s still plenty of upside in its future. In fact, even throughout the current coronavirus crisis, its performance has been beating Wall St expectations.And right now, we’re giving you a chance to discover exactly what has got our analysts all fired up about this niche industry phenomenon, in our FREE special report, A Top US Share From The Motley Fool. Image source: Getty Images Edward Sheldon, CFA | Friday, 1st January, 2021 The start of a new year is always a good time to think about investment themes that could power a buy-and-hold strategy in the years ahead. By identifying powerful long-term structural trends likely to have a big impact on the world, an investor can position their portfolio to capitalise.Here, I’m going to highlight five powerful investment themes I’ll be betting on in 2021 and beyond. I believe they all have the potential to power my portfolio higher.5G is here – and shares of this ‘sleeping giant’ could be a great way for you to potentially profit!According to one leading industry firm, the 5G boom could create a global industry worth US$12.3 TRILLION out of thin air…And if you click here we’ll show you something that could be key to unlocking 5G’s full potential…Online shoppingOne investment theme I’m very bullish on for 2021 and beyond is the growth of online shopping. E-commerce boomed in 2020, due to lockdowns. Looking ahead however, the online shopping industry is forecast to get much bigger. According to Grand View Research, the market is set to grow at an annualised rate of about 8% between now and 2027.To capitalise, I’ve bought shares in retailers Amazon, ASOS, and Boohoo. I’ve also bought shares in warehouse company Tritax Big Box, logistics company Clipper, and packaging specialist DS Smith. This gives me broad exposure to the industry.Digital paymentsLinked to online shopping is the growth of digital payments. As we buy more online, we’re using cash less and paying for goods and services digitally. Looking ahead, there’s a huge growth runway here. Today, 80% of the world’s transactions are still in cash.My two main plays here are Mastercard and PayPal. Both are leaders in the digital payments space. I also own Apple which has Apple Pay.Video gamingVideo gaming has come a long way in recent years. Not so long ago, it was a niche hobby. Now, it’s one of the world’s most dominant forms of entertainment. Going forward, gaming is likely to get a lot bigger. Driven by advances in technology, growth in mobile gaming, and the growth of e-sports, the industry is expected to grow by around 13% per year between now and 2027.My main investment for this theme is Keywords Studios. It’s a fast-growing company that offers technical services to game developers. I also have a position in Microsoft. It owns Xbox and now offers subscription gaming services.CloudCloud computing is another area of technology I expect to continue growing in 2021. Nearly all technologies we use today are underpinned by cloud technology. Between now and 2025, the industry is expected to grow at around 18% per year. To capitalise, I’ve built up positions in Amazon, Microsoft, Alphabet, Sage, and Okta.Gig economyFinally, there’s the ‘gig economy’. This could be the theme I’m the most excited about. In the past, the gig economy was associated with low-skilled jobs, such as delivery work. Today however, it’s a different story. Thanks to advances in technology, one in three professionals are now quitting the nine-to-five lifestyle and actively choosing to freelance. Overall, this market – which is set to be worth nearly $500bn by 2023 – is growing at three times the rate of the traditional employment market.In order to capitalise on this exciting theme, I’ve built up a sizeable position in Upwork. It operates one of the world’s largest freelance employment platforms. This stock performed well for me last year, rising from $12 to $40. Yet the market-cap is still small at under $5bn. I think the growth potential here is enormous. Our 6 ‘Best Buys Now’ Shares Click here to claim your copy now — and we’ll tell you the name of this Top US Share… free of charge! Edward Sheldon owns shares in Amazon, Boohoo, ASOS, Upwork, DS Smith, Clipper Logistics, Tritax Big Box, Mastercard, Alphabet, PayPal, Keywords Studios, Sage, Okta, Microsoft, and Apple. John Mackey, CEO of Whole Foods Market, an Amazon subsidiary, is a member of The Motley Fool’s board of directors. Suzanne Frey, an executive at Alphabet, is a member of The Motley Fool’s board of directors. Teresa Kersten, an employee of LinkedIn, a Microsoft subsidiary, is a member of The Motley Fool’s board of directors. The Motley Fool UK owns shares of and has recommended Alphabet (C shares), Amazon, Apple, Mastercard, Microsoft, and PayPal Holdings. The Motley Fool UK has recommended ASOS, boohoo group, Clipper Logistics, DS Smith, Keywords Studios, Sage Group, and Tritax Big Box REIT and recommends the following options: long January 2022 $1920 calls on Amazon, short January 2022 $1940 calls on Amazon, and long January 2022 $75 calls on PayPal Holdings. Views expressed on the companies mentioned in this article are those of the writer and therefore may differ from the official recommendations we make in our subscription services such as Share Advisor, Hidden Winners and Pro. 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