supply is limited while demand is getting higher and higher. its still early days for bitcoin bigger investments have yet to come. then there are different countries to adopt it, this is a solution for whole world. bitcoin has the confidence of investors with the brandname. yes other crypto currencies are coming up but the confidence level for bitcoin is way above altcoins. to hack a bitcoin you'd need a big chunk of whole world's computation power. cant say the same about other coins like bitcoin cash or ether. but i believe in underlying technology more than currency which is here to stay.