Bank of Montreal (BMO), has forbidden its users to use bank accounts for crypto-currency transactions. The reason for the blocking is the "instability of the price" of crypto currency, first of all, Bitcoin. This is reported by Coin Telegraph.
Effective immediately, BMO will be blocking cryptocurrency merchant transactions. This decision was made due to the volatile nature of cryptocurrencies, and to better protect the security of our clients and the bank.
BMO Staff Memo
The bank's statement says about immediate and effective blocking of all credit, debit, online payments for crypto-currencies, due to the unstable character of the crypto-currency and to protect the security of the bank's customers.
Cointelegraph notes that BMO did not mention the impact of crypto-currencies on customer safety and does not give any information about what happened.