Everyone has their own financial conditions, some love to do trading, some have not enough money for trading and some don't want to take any risk. According to me, $400 is sufficent for start trading in crypto. You can buy any cheap altcoins which is trustable and have good project, so that it will provide you profit in future. Otherwise, you should do bounties as well because bounty take only investment of time.
Daily trading is not for everyone, it also dependson the goal that the person has in mind, but bounty campaigns in general are safer, as you only invest a bit of your time in completing them.