1. Bitcoin
Yep, that's it. Bitcoin is all that matters. Investing in 99.9% of cryptocurrencies, especially in the long term, is worse than investing in penny stocks.
I also like you. The currency that I will choose to invest in 2020 is still bitcoin. Because there are many reasons: this is the most valuable coin on the cryptocurrency market. And Bitcoin is the only currency in the cryptocurrency that receives worldwide attention and acceptance. It has been accepted by several institutions and payment gateways. This promotes a strong development for bitcoin.