Bitcoin's annualized footprint in electricity consumption reached an all-time high in early 2022, then believed to be higher than the power consumption of Finland. This is according to a source that tries to estimate the energy consumption of Bitcoin (BTC). It does by assuming that miner's costs and income are the same thing: The higher the miner's income, the more powerful machinery it can support.
Exponential growth
As Bitcoin has a maximum supply, the closer the cryptocurrency gets to its limit of million coins, the more effort it takes to mine. Not every cryptocurrency has a maximum supply. Bitcoin, however, stands out as more than percent of all its coins have already been created. This exponential growth cycle indirectly impacts the overall size of the blockchain as well, as it currently grows less fast than it did several years ago.