In my opinion there is no need for large capital to start investing in crypto, you only need to do research and patience to get the right momentum, by looking at price movements in the market.
Campaigns need no money; you can make free coins in signature and bounty campaigns, just needed long time. You cannot make money from the first day. You need atleast 1 to 2 years to be able to make money from campaigns. On the other hand if you want to invest in bitcoin you can buy some satoshi and if your investment experience favors you, you can invest more.