Altcoin is a risky but some still do have a lot of potential. I invest into altcoins from ICOs anyway, except for just few that I may have missed which still have a lot to give. I invest mostly 60 to 40, bitcoin to altcoin ratio, since there is much altcoin to play around with anyway. That at least gives my whole investment a boost even when the altcoins are not doing pretty well.

Moreover, we have to face the fact that altcoins are really not that easy to tamper with based on their volatile nature when things really want to get awry and it usually take those with huge support for some not to fall back down hugely. So, in some cases, I actually do go into bitcoin 100%.