British bank NatWest has imposed new limits on the daily and monthly amounts customers can send to cryptocurrency exchanges in an effort to protect consumers from “cryptocriminals,” the bank said Tuesday.

Starting Tuesday, customers’ transfers to cryptocurrency exchanges will be capped at 5,000 pounds ($6,088) per 30-day period, with no more than 1,000 pounds per day, NatWest said in a statement.

Regulators around the world have warned of the risks of fraud and deception in the largely unregulated world of cryptocurrency trading.

Last year, consumers in the U.K. lost 329 million pounds to cryptocurrency crime, with the cost-of-living crisis exacerbating the problem as criminals lure investors with promises of high returns.

In June 2021, NatWest imposed some daily limits on customers transferring cryptocurrencies to cryptocurrency exchanges, including the leading platform Binance, with limits varying depending on the specific platform. This was due to concerns about investment scams and fraud.

Last November, Santander said it would block customers from sending real-time payments to cryptocurrency exchanges this year.