the problem is that many people would avoid using it if they know they can lose the value of what they're transferring by 10% or more in a matter of minutes or even seconds.
This is not a big issue if you are a business owner that accepts
BTC because you can always use some sort payment processor to convert the price into
BTC equivalent with the current rate. However if you are merely pointing this in the point of view of a customer than it is a risk that someone should take if they are using
BTC as payment method.
On the other hand, if you are dealing with larger amount of transactions then there is an advantages of using
BTC which is that you will pay less fee for the transaction which is a good deal and of course no question asked even if you are dealing hundreds thousand of dollars overnight unlike FIAT transaction in a bank
Personally I wouldn't keep my life savings in BTC it's just too risky (not only financially but also in terms of regulation, account can get hacked etc.)
With the current volatility, it is pretty bad decision of course to relly on
BTC as a life savings but if you are a fan of security then it is pretty much safer to relly on
BTC rather than traditional banking system if you know how to secure them properly .
Not only that
BTC is vulnureable to a hacking but a banking system could be hacked as well, it is a delusion to think that your life saving is save at a bank account because both is hackable but
BTC is much better in term of security