Bloomberg recites his advice:
“Bitcoin has no underlying rate of return,” said Bogle, 88, who started the first index fund in 1976. “You know bonds have an interest coupon, stocks have earnings and dividends, gold has nothing. There is nothing to support bitcoin except the hope that you will sell it to someone for more than you paid for it.”
Right or wrong, others seem to have a difference of opinion as the currency traded above $10,000 on some exchanges.