Best way to invest now is with fresh Fiat ;-)
First of all, if you are feeling low about the current situation as per according to your statement that all of your assets have gone red, you know better it will be opposite after few weeks for sure. All you need to do is relax and jolt, or much better buy some more coins. Secondly, you are absolutely right that now is the best time for jumping into the sea of cryptocurrencies. Buying at a low prices is smarter than getting stuff at expensive rate.