All the gains with btc were made already if we are looking for 4 years from now is only 2-3x .
If I have an investment opportunity that will give me a guaranteed return of 2-3x in the next 4 years, I won't say that it doesn't have a bright future rather I will put as much as I afford into it. To be candid, BTC is the most secured crypto asset one can have because it doesn't have any rival.
Meanwhile ETH and BNB can easily become obsolete tomorrow with the development of a new and more effective alternative.