Having faith in only one coin is not the best thing you can do, what you want is holding several coins to make sure that if Dash doesn't work out for you that you'll have some sort of backup. The thing with putting all your eggs in one basket is that if the basket drops, then all your eggs are done for, which sucks. Dash might never make it, what will you do then? It's a good idea to be more diversified than you already are and buy maybe some "main" coins. You have many options including ETH which is performing quite well and will soon go through several updates to make the underlying protocol more powerful. You need to have a back-up for Dash and you should own way more coins than you already do.