I cannot believe how dumb kids are...
Buying into other alts is fucking retarded as they carry the same risks as bitcoin.
Buying mining shares, altcoins, investing btc on shady websites cannot be considered diversification.
Well he's got BTC, I presume he isn't looking to diversify into gold or the stock market. I agree it isn't diversification but so what, he's into crypto, let him spread money around the crypto scene. We all have different definitions of diversification. Some gold owners diversify into silver