Bitcoin's existence is far from disappearing but like any other investments, the risk of losing your money is normal. Bitcoin has shown its potential over the years by the constant increase on its price but there are also external factors that significantly decrease its price like China's banning of ICO in their country etc. One cannot simply protect and secure bitcoin due to its decentralized nature, the primary factor on why bitcoin is still alive is due to the sheer volume of investors and individuals who utilize it onto transactions. Even some retailers are starting to accept bitcoin as a payment for their products.