Bitcoin and other cryptocurrencies are all the rage with investors — even as their prices have taken some big hits lately. So it should come as no surprise that there are now two exchange-traded funds, or ETFs, focused on blockchain technology, the digital ledger that...

Bitcoin and other cryptocurrencies are all the rage with investors -- even as their prices have taken some big hits lately. So it should come as no surprise that there are now two exchange-traded funds, or ETFs, focused on blockchain technology, the digital ledger...