Mayis.. "half a trillion crypto market cap" is pretty much what most news articles are reporting as the combined current value of all cryptocurrencies. Bitcoin's current market capitalization is $251 billion. ( https://coinmarketcap.com/currencies/bitcoin/ ).
All that statement is really saying is that crypto is growing and gaining acceptance as a currency, so this is a good time to be involved with it. "half a trillion" is actually a low estimate - the site I linked puts the "all crypto" total at 745 billion USD
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