Bitcoin is the only coin which can give you huge success than any other coin as you know that bitcoin price was such low then most of people desires to make investment and buy coin and now you can see those people who are in profit just because bitcoin price fluctuates but it does not implies that it is bad coin and investment in bitcoin is not good. I suggest that keep eye on its worth and if you think that is good to buy or sell then do it as it is most trustworthy coin.
If investing only with bitcoin I think need weird to borrow much money because little fund for investing on bitcoin just achieve little profit only, I think is worth if you try weird borrow money and invest with bitcoin but you need brave borrow money with higher amount, maybe $30,000 looks worth if try investing on Bitcoin and take profit about 3% every day. Maybe without one years you can finish to pay your borrowing and keep get profit if you know when have to invest on bitcoin and get good chance during bitcoin have lower price.