Elon says that tweetcoins can be compounded into a 'Diamond' (?) that you can sell.

Now that sounds like a cryptocurrency to me that can be listed on, let's say Binance as a 500m$ investor in Twitter. Elon and CZ could pump and dump the shit out of that token, luring people into buying more tweetcoins or earning them by engagement on Twitter, so they can sell Diamonds. Diamond value wouldn't be pegged to the wellbeing of Twitter, so no security.