Yeah the financial crisis bankrupted the banks themselves. The structural foundation of the financial and banking industries were interconnected to bad mortgages that were distributed into financial instruments everywhere and speculated on like crazy by everyone, because they were mortgages and considered safe like bonds. Part of the reason why companies like GM went bankrupt was because their financial arm was significantly invested in mortgages, banks failed because their entire financial model was centered on mortgage returns, and people defaulted on houses en masse because they were allowed to get mortgages they were never able to afford.

But no one investing in stocks, particularly tech stocks, is doing so without explicitly gambling that money. A lot of venture capital might collapse, retail investors are going to get shit on, the general economy will slow as it does during a recession, but mostly this will play out like the dotcom bubble and be a large asset correction in the stock market. A few years of correction, consolidation of the industry, and everyone will pile onto the next bubble in a decade.