I think we still need altcoin for additional investments besides bitcoin, bitcoin is the best investment among other coins, but altcoin also has good potential for future investment. Honestly, altcoin is very important here.
I think Altcoin and Bitcoin have the same investment potential because both have advantages.
Altcoin can actually be very profitable because it can go up 100% - 1,000% or even more. Altcoin also has a relatively low price compared to Bitcoin.