Every one sees cryptocurrency as a means of payment, but I rather see it as store of value. Something like gold or real estates, but it is much better because nobody can steal it, even the political situation change in your country, nobody can take your Bitcoins. Those who lived in communism know what I'm talking about. 
for a sentence that says that cryptocurrency cannot be stolen I think you should look at a variety of cases that often occur in several places of exchange and several projects that are a lot of scams and theft of assets by phishing and others, in cryptocurrency will be more vulnerable because it is easy to money laundering..