How many cryptos should Ihave in my portfolio? Are there one recommended diversification ( like having 3 or 4 coins) ?
It depends on how much money you will use. If you have a little money to use, then you need to buy some coins (like 2-5 will do) then if you earn money, invest in another coin. You can buy coins one by one if you want and better than the results you develop again do not immediately taken.