Similar reason people find gold appealing I suppose.
Hyperinflation is a symptom of economic problems, not the origin of it. If you find a way to prevent nominal inflation by crypto, it doesn't prevent the related problems. There's a good reason why we got rid of the gold standard, which had all the same problems as a crypto-based economy would have, and was unsustainable because of that.
Since you mention bond positions, if they'd were denominated in non-inflationary crypto, in any such scenario they'd drop anyway - if it wouldn't be possible by inflation, then it'd happen by defaults. Which would also mean a default of all credit institutions. Which would then mean the disruption of most businesses who rely on these institution. Which would then mean nonpayment of salaries. Which would then cause a lack of demand, causing even more economic problems. Compared to that, a semi-orderly inflation (up to the extent that is required) is preferable to a cascade of defaults. The vast majority of the money in economy is anyway in the "I owe you" form, and crypto doesn't change that; even if all the economy would move to a cryptocurrency, only something like 2-5% of it could be in the form of "hard coin that I control" and the rest of it is in debt relationships between various businesses.
It sucks to get paid in some paper that's now nearly worthless - however, the alternative isn't to get paid in hard crypto, in such a scenario the possibility to get paid in full doesn't exist. So if we don't have the possibility to get paid in a devaluated currency, then people either don't get paid at all, or have to suddenly invent a new worthless paper currency and build an infrastructure for it, at a time when they don't really have the time and resources to do it. This isn't a hypothetical example - such "currencies" have developed in e.g. various long-term conflict zones.
How so? For a net debtor, deflation is potentially ruinous.