That was just a joke, for now.<p>The idea that we&#x27;re in a bubble on the cusp of collapse has been building over the past year, spiking when the feds raised interest rates, but there&#x27;s no concrete evidence of a bubble popping. Yet.<p>Get worried when we see (multiple) high-level execs also resigning from Facebook&#x2F;Twitter&#x2F;etc. Especially if it&#x27;s of their own accord...