Not only 2020-2021, but many more years, without any competition, BTC and ETH will stick to their respective places. Looking at the market capitalisation, it's very hard for any project to reach to it.
I agree. You don't need ten projects to invest in. I personally would prefer
BTC of course and a few selected alts, e.g. ETH, ADA or DOT. In addition to that I won't choose any DeFi projects, since there are so many scams out there. You basically can't tell if a project is real or just another scam. It really reminds me of the ICO bubble in 2017/2018. New projects getting hyped day by day, but you can't tell if they are legit or not.
BTC and ETH will always be there, they have already consolidated their position, TRON has still shown itself well for me, I think it will also be fixed in the top, and with the first 5 points I am solgasen
Why do you think TRX will rise? I am still not sure if it has potential.