How much resources are used to produce something is determined by the value of that something. At the moment, about $6B worth of Bitcoin is mined per year. So roughly $6B of resources are used to mine Bitcoin. About half of it is hardware and half of it is energy.

At the same time, about $150B of gold is mined every year. So roughly $150B of resources are put into gold mining. Energy, dynamite, melting, transportation etc. The use of these resources is just as "bad" for the climate.

So if you wanted to do something for the climate, going against gold mining would be more than 20x more effective than going against Bitcoin mining.

Additionally, the production of Bitcoin is halving every 4 years. While the production of Gold will go on indefinitely.