Last year I invested 5 ETH on a new coin which was so hyped. The coin was Xfinance, It was pump from $20 to $250, then they announced one more coin, invested 1 Eth on that too, after 3 days, the owner has dumped all his coin, and took all money and ran away. I lost so much money there, So I know the feelings.
That's too much lost. You should've just held your 6 ETH in total. I won't put into any project a coin that I'm believing that has a better future. You already have the gold for alts but turned into fake brass and turned into dust.
It's regretting if you look back into that experience especially if you're going to compute how much those ETHs would be right now. But, it's a lesson that you'll also benefit in the long run as you won't invest anymore to those projects.