never ?, are you sure?, look at the cryptocurrency market now and compare it with the stock market,
the conclusion is you will regret, if you dont invest in cryptocurrencies!
not really. If you invest predictably and without the support of clear information on new coins, I would be better off holding my assets than investing. however, in the crypto world, we cannot be in a hurry and invest in altcoins randomly. however, we need to choose it so that there is no loss. besides, everything requires patience, because this is not something that can make you rich quick as the author of this thread said.the conclusion is you will regret, if you dont invest in cryptocurrencies!
exactly, but you also need to define "quick" this can mean 1 day for me
few hours for someone else, to maximize profit there are many factors some are controllable and some are not, these factors are not only responsible of maximizing your profit but also to minimize the risk (both risk of loss and risk of getting poor quick 
)1. timing
2. luck
3. coin you choose
4. knowledge about trading in general and in crypto specifically
5. budget
remind me if I forgot something, but these are the main factors in my mind.