To make a profit, you need to invest and hold the top coins, because they will always be safer to invest and they will always be promising, only you need to constantly analyze the top coins.
thats right, by holding the TOP cryptocurrency such as bitcoin or ethereum is the best way to invest in crypto industry
anyway for the OP Tezos and Cosmos also a good crypto to hold too buddy, because both alts now is the TOP 25 coin at coinmarketcap
regards