the truth is that you should hold bitcoin and altcoins seems worthless. Buy top 30 altcoins if you don't want your investment to disappear.
Prior to that I suggest you to buy 1 btc at least
I usually divide my capital into 20% 30% and 50%. I use 30% to buy Bitcoin, 50% buy coins that are in the top 10 biggest currencies in the market. The remaining 20% I will use to invest in other currencies or new currencies.
Always divide your investments into multiple items and keep at least 1 BTC.