i hardly understand your question sir, can you explain it better?
from what i understand i can say that
if a coin was popular in 2018, and price fell in 2019 you can never know what will happen in 2020 from this details
it depend on too many things..
It must be remembered that crypto is very difficult to guess, and indeed what you say is reality but there must be a sense of optimism that needs to be built so that many people return to trust. so that many good projects begin to grow because investors are very confident and see that there is optimism built.
so there must be a desire from all parties that there will be changes that can re-excite crypto.