The harm is not limited to you.
Electricity shortages: https://www.cnbc.com/2021/05/26/iran-bans-bitcoin-mining-as-...
Chip shortages: https://www.fxempire.com/forecasts/article/bitcoin-mining-ad...
Ransomware: https://www.marketwatch.com/story/bitcoin-extortion-how-cryp...
In terms of overall negative impacts, crypto is worse than ponzi schemes and online gambling.