Apparently, even cypherpunks hate paying taxes. So-called 351 exchanges are all the rage with wealthy investors who want to transfer assets between holdings in their portfolios without triggering capital gains taxes. They also let investors with heavily concentrated stock positions convert them into a diversified exchange-traded fund. But what about cryptocurrencies, like bitcoin? Some experts are working on new strategies that, one day, may allow digital assets to be converted into indexed products witho ...