It is simple, it is through Altcoin you can easily multiple your money, for BTC to do X2 from the present price is bid deal, but very easy to see Altcoin do 2X, 3X in a matter of weeks
This is a big part of my reasoning also.
I hold and trade BTC, but I also hold and trade some of the better known at coins that seem to be doing well.
Like Ethereum, Dash, etc.
Then I look at new coin offerings on the main exchanges, that is where the biggest growth potential is.
Like one I just saw earlier today on C-Cex called Unity ingot UNY, I will probably buy some of it and a couple more before the eblnd of the week.
I watch them and if they are growing I buy some more.