There are many wallet to store ETH but I store my ETH in coinbase and Mew only. I think coinbase is a safe place to store ETH.

Did you find what you invest in? I think the first you can study markets, coins, ask everybody which you don't know, and then you can decide by yoursefl to invest in what coin. It is the best way to get the benifits.

I heard that the price of Bitcoin will be dow continue. It's maybe around 5k~ 6k USD. This is because one coin trade maket of Korean wa hacked. I hope the price of Bitcoin will go up again

I saw many many bounty/ airdrop programs now, but I also don't know what are true program. I did airdrop of many programs, but didn't get anything. I think, you should study and find information about programs on forums as bitcointalk before do it.