I heard bad news from one of my friends, he is a bounty who has had a pretty good income. recently he lost the token bounty and also eth that he has in his wallet and estimated the amount is very large. I am afraid that I will experience also, what to do for token, ETH and also we can not be stolen by others, can you seniors provide the best solution for me and also my friend. what type of wallet do you use to store your eth and btc safe?