Cryptocurrency transfers are very risky, because hackers are very active. That is why it is important that Digital wallet has license for work in Japan.
It is very difficult to hack a bank because it is very well protected, but it is much more simple to hack cryptocurrency exchanges and wallets.
That is why hackers prefer to hack cryptocurrency exchanges and wallets
![Huh](https://bitcointalk.org/Smileys/default/huh.gif)
They much less protected than banks and very often hackers avoid punishment.
The big problem of cryptocurrency industry is that hackers and scammers avoid punishment. It provocate them for new crimes.