you're practically anonymous when in btc transactions so if you get scammed it's hard to trace your scammer
bitcoin prices are not that stable, sometimes it can skyrocket and sometimes the price can go down just like now,
you can do trading or other business as a part time job but btc is far too unstable to be a fulltime job just in my opnion.
And lastly you have no assurance in bitcoin, in how long they will exist or will it be popular or it will be obsolete in the near future.