How many cryptos should Ihave in my portfolio? Are there one recommended diversification ( like having 3 or 4 coins) ?
First, you gotta make a decision to invest in very promising and tested cryptos no matter how much it costs you. For instance, you can choose Bitcoin being the most dominant and the base currency of cryptos. Add more Ethereum, Ripple, and EOS too for these cryptos can follow bitcoin's path.
And I hope you must advice this man that the most trusted and efficient crypto is bitcoin. Nothing else than this propounding crypto in current market. We need to promote bitcoin.
No matter how much you tend to advice people on that, they always do not seem to realize that, and they still do whatever they please in the long run anyway. The issue with a lot of people is that they feel they have missed the bitcoin train and they felt altcoin will end up giving to them what they have missed in bitcoin.
However, it is better they realize that altcoins are just distractions for most people entering the space newly and if they are not careful, they will just realize that unless they know how to handle themselves in the alt space to look for projects with a quality product which is hard to find, then there is no way there will be anything for them.
with the number of coins that are indeed we are required to choose good coins for infestation, but if there are still doubts, there are some coins which are certainly the safest, as mentioned above, these coins can affect the development of other coins