I do not think that the bank is more reliable. banks also have properties "burst". But in matters of profit, banks can offer you 1.2 or 5 percent per annum, and a cryptocurrency can bring up to 1000% per annum.
Unfortunately, investing in cryptocurrency can sometimes bring not a profit but a loss. Throughout 2018, many investors suffered losses and did not make a profit. I hope that in 2019 the situation will change for the better.