Dear friend,
So far, I know for kind of earning money from bitcoin and altcoins.
I start trading when bitcoin 17000. until now, I lost a haft of money.
ICO I have win any ICO. But I did not invest to much.
Lending I think have not join anyone. But I think in the first time you can get profit from lending. But no more later.
And now, bounty, I still reading and research information about it. No one help or support. One day, hundreds of campaign public. But dont know which one scam or good.
I am distempered. Need more advice from you here

It all depends upon whether you understand the crypto market or not otherwise loss in crypto trading is somewhat certain. Crypto market is very volatile and if you have no knowledge of how it works, you will loose tons of money for sure.
Most of the ICOs out there are probably scams and you need to check and verify many things before investing in any one of them to earn profits.
Doing bounty and lending your coins are two of the safest options out there to make money for a newbie.
Bounty is safe indeed, but lending is not so safe. It's not that hard to get scammed there if you are not careful. Also even if you had altcoins as collateral it could just lose value in an instant. So you can't say those are safe.
I would say the safest way to profit in any case is to always do some kind of work and working smart. It doesn't involve a lot of capital and a lot of risks but the rewards are always exceptional.