Assuming Trump wins NOT A BIG ASSUMPTION do you really think he is going to repeal the rule that you have to pay tax on bitcoin even if you didn't convert it to fiat? No of course not. So nothing is going to change...
Bitcoin has value already and now regulated. Bitcoin should be tax whether you like it or not or else it will be an easy escape goat for tax evaders.
If you are really gaining something on Bitcoin then why you don’t like to pay taxes. It’s your obligation as citizen to pay taxes if you gain. Be happy US citizens is not restricted to use Bitcoin because government already regulating it properly unlike other country that discouraged the use of Bitcoin through total ban and unfavorably tax percentage.