We should be able to differentiate between all-time-high in price of assets which is usually in US dollar and the real all-time-high in value. Gold was able to reach all-time-high in price if compared to UD dollar this year, but in real value, gold has not reached all-time-high since 1980. While bitcoin in just three years reached all-time-high today in price in US dollar but not yet reached all-time-high in real value as it needs to get to a price of $21,131.02 as a result of US dollar inflation too, but very possible this will only be achievable in just less than three years.
I think I saw bitcoin trading as high as $24k on africa's golix exchange in 2017. Markets are considered accurate at setting prices. But there is no finite timeline for how long it takes for undervalued and overvalued assets to normalize to a correct value. Inflation is a particularly touchy subject due to its distribution side(into whose hands does newly printed fiat go). And the insistence of experts to redefine what terms like unemployment and inflation mean on a fundamental level.
If you're interested in inflation, you might find this interesting.