I am also in Ukraine and I can say that some of the information reported here is not true. The banking system in Ukraine is still working more or less normally. The hryvnia exchange rate fell very slightly. The National Bank has limited cash withdrawals for one day to the amount of UAH 30,000. It's about one thousand dollars. This is a decent amount and I think that in the current conditions it is normal.
Before sending donations to Ukraine, you need to make sure that the wallets provided are official.
Since I see that the account that provided the public address for donations is almost new, I would not trust him.
I am also from Ukraine, the banking system works, cash withdrawals are available. The situation is difficult, but we are holding on. There are very difficult areas, volunteers try to help everyone who needs it. There are no indifferent people, everyone has rallied as one, they help the refugees give clothes and provisions, there is where to sleep.