A very unwise decision. Bitcoin is solid and can be hold long term, the others? Not so much. If you are a high risk short term experienced trader, you might get some profit from these highly risk altcoins, but as in most tradings, 90% lose.

I agree with balancing stocks with Bitcoin investments, that is fine. You can add traditional assets like metals/minerals, or even some forex if you feel riskier, its your portfolio after all... But with altcoins? Expect loses and loses and loses for years to no end. Only rarely they might spike (or you could have luckily bought a dip before a spike).