The opportunity cost of not owning BTC. These are short term charts, they look even uglier as the time frame gets longer. Only XRP is looking anything close to acceptable, but on the 10 year you get a better perspective. ETH holders should've bailed by now. The alternative is to just hold what you have and offset the losses at some time in the future with any capital gains you are liable for if you sell BTC. I don't think capital losses in one asset class can be applied to other asset classes eg losses in crypto can't offset gains in precious metals or shares.
Actually I'm not so sure now: https://www.ato.gov.au/tax-and-supe...s-newsroom/the-need-to-know-on-capital-losses So crypto losses can be applied to share losses etc? But any losses in collectables eg PM Lunars, RSC Macaws etc can't be applied to losses in generic bullion?
My take is that is has to be same asset class but happy to be wrong on that and accelerate some losses for 30 June v other profits.