Transactions of course but you can exploit altcoins, do not expect to get daily altcoins through bonuses and airdrop because it takes time before you get some bounty bonuses and sometimes it does not. the cost. Learn how to do intraday trading and you can have what you want.
If you want to multiply your coins so easily then the best thing to do is just become a trader in the market, in this way you can earn more profit in the market depending on the volatility.