Thanks again for those answers.

I don't think i should transfer my coins to electrum yet. It seems like many (or even all) big online wallets/brokers are saturated right now, and i see a lot of people complaining about very slow money transfers (or even ""stolen"" money!!).

I think i'm going to buy my btc and alts from CEX.IO. Is that a reliable site? I definitely won't use Kraken indeed.