First, high inflation is good for holders of some financial assets (e.g. stocks) and bad for others (bonds). It's good for existing borrowers and bad for existing lenders. It's good for those in debt and bad for those who saved cash. Essentially, high inflation punishes financial frugality and rewards financial speculation.
Second, massive inflation-caused economic collapse is highly unlikely in any developed nation today. The more likely path is either 1) reasonable economic growth with high inflation (say 5% to 10%) or 2) economic stagnation similar to what Japan has experienced for the last few decades.
Be aware that the people predicting debt-fueled hyperinflation-style economic doom & gloom have been doing so for nearly half a century now. They have been saying it's a few years away for decades. Every recession they say "we were right, it'll just get worse!" They have been wrong every time for 40 years. Maybe they'll be right in the coming few decades... but I wouldn't bet my financial future on it.