Value is relative and adapt itself to its market. If the market is 21 millions unit, the value will adjust accordingly. If the market is 8.7 millions unit like today, the value will adapt itself.

Even if in 10 years from now, there's 10 millions Bitcoin available(because the rest is lost), the market will only adjust itself to the current supply. Bitcoin will worth more to compensate for the lack of Bitcoins. It's a hard cap market, where the supply is limited. Whether the cap is 21 millions, 5 millions or 150 millions, it is still a hard cap that will never be breached.

This wallet heartbeat plays around two important values of Bitcoin:
-The supply limit
-Individual control

Supply limit for $CAN is a soft cap. You have a limit that can be modified.
Supply limit for Bitcoin is a hard cap. You have a limit, you're stuck with it.

Individual control for $CAN is shared. You can use it as you wish, but it's still the property of the Bank of Canada.
Individual control for Bitcoin is completely individual. You control it so much that you can print your own money, and you can delete your own money.

A wallet heartbeat will maximize the supply under the limit, but will never change the fact that you have a maximum, whatever the value is.
However, the wallet hearbeat will forever change the individual control of Bitcoin from "individual" to "shared".

I'm sure the intentions are good, but you're playing with the fundamentals values of Bitcoin. Changing one of these values means that it's not Bitcoin anymore. Making a new currency with that solution could be interesting, because it could offer a new set of values on the market. But you can't implement this into Bitcoin without denaturing Bitcoin itself.