Bitcoin billionaires selling to avail 'incredible' tax benefits of ETFs, analyst says [https://www.thestreet.com/.image/t_share/MjE0MjAxMjUwNjU5NDQ0NTcz/bitcoin.jpg] Bitcoin billionaires selling to avail 'incredible' tax benefits of ETFs, analyst says Martin Hiesboeck claims Bitcoin maximalists coined the term "altcoins" to disparage other crypto projects. [https://www.thestreet.com/crypto/trading/bitcoin-billionaires-tax-analyst]