I would assume most of us do covert our BTC to fiat to be able to use it in real life. I know someone who kept buying BTC which I'm also selling to him every time I want cash. He invests in BTC and buying my BTC either to fiat or Paypal money depending on which I want. He buys mine for a fair price.

I'm keeping my altcoins however incase I got some tokens that are promising but when I convert it to BTC, I always sell it to him.