Because having bitcoins preserves value, you might see it as spending but it is actually saving. They can still choose to spend it on hiring people if they wanted.
Except he designed and coded the whole thing and provided every day support for 2 years.
>The price has gone up by several orders of magnitude
Price of the Bitcoin doesn't mean anything if it is not used as cash as Satoshi intended. You don't receive your salary in Bitcoin and you don't shop with Bitcoin. Speaking of price even regulated assets like stocks are prone to hype and excessive speculation see Dot-com bubble [1]