Bitcoin closed its best week in four years on Monday, and on Monday came close to its highest level in nine months. Some investors are turning to digital assets due to the turmoil in the traditional banking sector.

After reaching its highest since June 12 on Sunday at $28,474, the largest cryptocurrency in terms of market value fell 1.8% in Asian hours to $27,549. As the banking sector turmoil has spread around the world, it increased by 26% last week and by more than 35% in ten days, starting with the collapse of Silicon Valley Bank and culminating, so far, in the purchase of Credit Suisse by UBS at a discount over the weekend.

According to Markus Thielson, head of research and strategy at Matrixport, a Singapore-based financial services company that specializes in digital assets, “the momentum is fueled by liquidity because bitcoin is an alternative liquidity vehicle.”