It depends why you are buying it, what your personal financial situation is, different reasons for different people.
We are not buying our T6.1 as an investment. We set the money aside 8 months ago when we started the process. We are buying our Cali with the intention of keeping it for many, many years and making many memories. As horrendous as this whole situation is life will return to normal, at some point. This virus has made us realise that life is finite, and when our van arrives (it is in a field somewhere in Germany) and the lockdown removed, then we will collect it. Obviously if there are suddenly new offers/prices from VW then we will review but fundamentally we intend to proceed.
If the value of our Cali falls, then so will everyone else's. As will houses, cars, shares etc.