The effect for Ukraine and Russia is positive if we'll just talk about the usage of bitcoin. Since the sanction that have been placed on Russia, most payment solutions have stopped operating on their end so, they've got no choice but to choose some ways of transferring and doing transactions by avoiding the sanction and that's through bitcoin AFAIK.
I don't know how you claim that bitcoin has a good effect on its price due to war? If there is instability in the world, people will not invest in any currency which is volatile.
And so are traditional markets, but what bitcoin does though is to hedge their against this inflation due to war in Europe.
Yes, Russia has no option but to use bitcoin as a payment solution if all other doors are closed for them but they need the other party (government) to accept bitcoin payment too. The fact is our global economy is based on the US dollar and bitcoin can't stand in front of it. We still see US economic indicators or KPIs like CPI data, and employment data to determine the pump and dump of bitcoin price. That is how immature is the bitcoin market at the moment.
It will take a decade or so when bitcoin will stand out and the world may start accepting it on government levels.
And yet Russia become the second biggest miner in the world behind US:
Obviously they have cheap electricity cost to do it, and maybe this is one way to get around those sanctions.
Russia has become the world’s second-largest cryptocurrency mining country this year, the Kommersant business daily reported Friday, citing Bitriver, Russia’s largest bitcoin mining provider.
While the United States remains by far the world's largest crypto miner, boasting 3-4 gigawatts of mining capacity, Russia’s generating capacity reached 1 gigawatt in January-March 2023.
In taking second place for the first time, Russia took a spot previously occupied by Kazakhstan, which introduced restrictions on crypto mining activities in 2022 and now ranks ninth, Kommersant cited Bitriver as saying.
https://www.themoscowtimes.com/2023/04/07/russia-becomes-worlds-second-largest-crypto-miner-a80749