Holding an inflationary token is terrible and it's like hold fiat currency that only loses purchasing power with time. Fortunately, holding a deflationary token can help us to avoid decrease of purchasing power but it is not enough to maintain its price on the market. Other things need to be done like a live business, use case and utility but do we have all these with Rollbit business, their dedication on RLB token?
First, concerning benefit of holding deflationary tokens, there are alot of deflationary tokens in the crypto market right now that if you look at their prices, they may appear very cheap; which is good as an investment, but if you look at their activities, trading volume on exchanges, you did be discouraged from buying because, they don't seem like what will be valuable in the future.
So, in the end, I have to agree that the value of a token boils down to its use case, or utilities, deflation only supports a tokens use case to make the token valuable, without use case, a deflationary token will still end you valueless.
And concerning what you said about the market, that I completely agree with as well.