There are lots of wallets to choose from, and getting even more. Probably the best choice is to have a hardware wallet and use it with compatible software to be sure that your coins are secure. This way you can minimize the risk from malware, scam sites & links etc. Besides the known hardware wallet like Ledger, Trezor, KeepKey there are others as well like Bitlox, Bitbox and others to check out.

That is one of the problems that blockchain technology will have to solve. The size of the chain will keep growing as the number of transactions grow and this is a quite a problem. The advancements in this area like Ethereum sharding, BTC Lightning network will try to remedy this problem, but only the future will tell.

Thanks a lot ! Im still new here and i'm a little lost.

How does exchanges work ? Is it like a wallet where you store your tradable funds ? Is it safe?

Does exchanges work as a wallets ? I mean do you transfer your funds to the exchange and is it safe to keep them there?

What are the advantages and disadvantages of Trezor and Nano Ledger ? Which is better?

Will the wallet support ERC20 Tokens ?

What exactly is MetaMask and how it connects to your wallet ?

Which is the best and easiest to work with wallet ?