The magnitude of such thefts could only happen because so many hodlers
   are lazy and keep their crypto booty in custodial exchangers instead of
   in their own wallets (especially hardware).
   [1]https://cointelegraph.com/news/report-1-1-bln-in-crypto-has-been-sto
   len-this-year

References

   1. https://cointelegraph.com/news/report-1-1-bln-in-crypto-has-been-stolen-this-year