Whenever I see a bubble burst or a crash or anything that basically causes the banks to go down and money to be lost and governments to actually give away free money to big corporations I remember what Warren Buffet did. Dude basically bought out a HUGE part of Bank of America when it went down after 2008 but realized that they were not really an investment bank the size of others, it was more of a commercial bank at a huuuge size and they weren't doing all that horrible neither, so he bought huge sums of stocks from them and also lend them money in billions to cover up their quickly needed debts with a decent sized interest as well.

What happens is, he got his money back from the lending with interest, plus he got stocks for it as well when they couldn't and bought even more stocks. Of course with his help Bank recovered and became great again, yet that only worked out well for Warren as well . So, I always remember to see the opportunities in crashes.