a) Yes, likes of Circle and are solving this with USD balances and instant conversion to btc, also bitcoin has not been that volatile in last year
b) Coinbase a YC company and Circle mentioned already are doing great job on this end
c) Since bitcoin is basically digital equivalent of cash thats like asking for wings on a car. As for security I have a hardware Trezor wallet on my desk which keeps keys secure even if my computer is infected.
You see problems, I see opportunities for startups
The early internet had many problems, those companies that solved these problems are now household names.
(a) the price was so variable that there was no way to know how much I was actually going to pay for anything;
(b) turning real money to Bitcoin and back again was an utterly horrible experience (and expensive);
(c) total lack of any recourse against fraud or theft, plus a rather scary security track record.
Have these got any better recently?