Crashes like today is the reason why you should have some spare cash for investment.

First of all, today's crash isn't even really a crash. It's just a normal dip that happens from time to time.

Secondly, this is why you never invest all your money at once. You need to have some spare cash to buy more coins at a lower price. Today is a good example of that.

Thirdly, if you invest only in legit projects that have a real use, then you don't have to worry about this dips and crashes. Simply hold them and ride through the storm. But if you only invested in shitcoins or alts that are all hype, then I'm afraid you will lose most of your portfolio.

In conclusion, be greedy when others are fearful.