Having a diversified portfolio is pretty important, especially if you aren't keeping up to date with news and developments yourself. Some things that I would be wary of would be what their contingency plans are if ETH doesn't end up succeeding and what the outcome of a large altcoin downturn would affect your portfolio (I guess that would be actively rebalancing to minimise the effect of that). Also, you would need to check if you are easily able to trade the C20 tokens if you had the inclination to do that... at the moment, I think it is only at HitBTC (which is a dodgy exchange...).... possibly some DEX would be better.
I have to check, but I think I have a small amount of their original C10 offering...