All is hackable, above all if it is a online system.
But i think that is not easy to hack the bitcoin system, and the team is constantly work to make secure their systems
Bitcoin is not easy to hack in terms of its system and transactions in the market. I think bitcoin is more vulnerable to have a good glitch or maintenance in order to fix some bugs or error. So it is more capable to develop and experience growth for it to be a better form of crypto-currency for future purposes.