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I can give you the basics advises:

  1. don't keep your cryptos in an exchange - buy a cold storage wallet (I have a Ledger nano s but there are others) as they say if you dont own the privet key do dont actualy own the coins you think that you have.

  2. the coins i keep in my wallet are the ones i don't intend to sell in the short run :bitcoin litecoin monero dash my steem are in my steemit account

  3. i speculate with many other coins (buying up to 0.1 bitcoin) that as soon as i see 30% 40% gain or more - i sell but most of my money is in the coins above.

  4. don't invest money that you cannot afford to lose

good luck bro
:)