In my SIPP, I'd originally brought £25,000 in April 2019, and sold it all for £273,000 at the beginning of February just before the price dropped, so timed the market quite well, surprisingly. I've recently brought another chunk of £50,000 worth, but I'll also have a certain amount in the various US tracker funds.
The massive increase in share price from last year onwards and assuming it will carry on rising, is quite a gamble, as there's no logic in the market capitalisation being so high.
