F1 cars coming up for auction. Are these appreciating assets?

Last year Schumacher's 2001 F1 car sold beyond the estimate for $7.5 Million:
https://www.cnbc.com/2018/03/22/pictures-ferrari-f2001-race-car-owned-by-schumacher-sold-at-sothebys.html

Now his 2002 car is coming onto the block this November:
https://www.roadandtrack.com/motorsports/a28083782/michael-schumacher-ferrari-f2002-f1-for-sale/

Then its announced (not to be outdone?) Niki Lauda's 1975 Championship car will be at Gooding & Co.
https://www.autoblog.com/2019/06/20/niki-lauda-1975-championship-f1-car-auction/

Will these car exceed the $7.5M high water mark? (Note: Niki's car is a "stick" LOL)
Or, are these owners cashing out while the getting is good?
With GTO's going for crazy money; is this the next place to diversify one's portfolio?

Discuss...