As advised I am trying to learn the basics of crypto first.
Most of the suggestions mention investing in top ranked coins. My question is, does it always work? As far as I understand, the market is vulnerable and affects almost all the coins from top to bottom. How then you determine which ones would stay ?
there is no defintive answer to this question, you have to investigate for yourself which coin do you believe in. Also not always the best coin out there will have the biggest gains, sometimes FOMO us with some other coin which could be bad project after all.