Since 2010, Bitcoin has consistently been making a profit (except for 1 year).
Year-----Price at the Start of Year------Price at the end of Year--------Growth in %
2010----$0.0015--------------------------- $0.31----------------------------- 20566%
2011-----$0.31-------------------------------$6.18-----------------------------1893.5%
2012-----$6.18-------------------------------$13.44---------------------------117.5%
2013-----$13.44-----------------------------$751------------------------------5487.8%
2015-----$285--------------------------------$435.7---------------------------52.8%
2016-----$435.7------------------------------$952.5--------------------------118.5%
2017-----$952.5------------------------------$18737-------------------------1967.13%
Yes, I deliberately missed one year: 2014. In that year, Bitcoin prices plummeted, incurring a 62% loss to investors.
That happened mostly because of the MtGox hack in 2014. After that, the price dropped from $751 to $285.
The fear of a blockchain hack engulfed investors, but it was not the blockchain which was compromised. MtGox had several fatal and exploitable flaws.
But every other year, the price of Bitcoin has steadily increased!