To a certain extent. But the "speculative attack" scenario (c.f. @Pierre Rochard) doesn't intrinsically require retail spending. Many consider Saylor's "Strategy" to be a speculative attack. Use BTC as collateral to drive up inflation, basically play off a deflating currency against an inflating currency...

And he's a registered business with the SEC and he's extorted for taxes as well, so as long as the Bitcoin appreciates, he is either forced to sell or continue pumping more fiat into the system. This is not an escape velocity strategy. He is a giant target that will either be liquidated or a criminal in the future. There is no third option for him. So again, don't self incriminate to the government and transact with Bitcoin however you feel is appropriate.