The best cryptocurrency to invest is bitcoin because it seems it can be even only winner in the very long term. Other ones are very risky, privacy ones can be threaten by governments.
Yes the best cryptocurrency to invest is bitcoin for me especially in long-term investment, even they have risk it always gain high profit. Bitcoin now accepted in so many countries cause they see the true value of bitcoin and also the best buy when the price value is down and hold it and wait for the right time to sell it and you gain a high profit from your investment.