Cryptocurrency analysts say at least $13.7m (£10.2m) has so far been donated to the Ukrainian war effort through anonymous Bitcoin donations.
Researchers at Elliptic, a blockchain analysis company, say the Ukrainian government, NGOs and volunteer groups have raised the money by advertising their Bitcoin wallet addresses online.
More than 4,000 donations have been made so far, with one unknown donor gifting Bitcoin worth $3m to an NGO.
The median donation is $95.