To lower the price or an attempt to discredit crypto as an asset to protect their grounds with Fiat/credit.
Imagine for 10 seconds that all governments switch to Fiat. All the investors in cryptocurrency to just profit in Fiat, all companies whom's revenue is via 50% (or more) is in Fiat/credit, every Fiat/credit system institute, Buisness and trustees (Fiat middlemen) will instantly loose worth. Even if this secnerio is 100 years away, it is still damaging to these people. Drug cartels, bank cartels, credit cartels, government lobbyists & tax/fund avoidance groups all require Fiat & Credit to survive for their business to survive. Think of all the money these groups and people within it paid in registrations, Licenses, etc just too begin their job fields. To them they are going to have to learn more new info that may cost them more money plus if Fiat or even just credit is removed many of these groups will quickly die off. Also keep in mind, credit is used to obtain larger sums of Fiat that the person or Buisness doesn't have at the time plus credit is used within major Buisnesses to decide partly whom to trust. For example, many attested business people whom was incarcerated for white collar crimes are often hired to watch over bookkeepers or over the people with spendage allowance. They get the job for 2 reasons, even thou they went to jail or was considered guilty to crimes that involve hiding/moving money gives them a unique lead in finding unlawful activities and after they get out of jail/sentence their credit is still good. Now the company hiring knows they know how to find unlawful activities and how to handle their bills during "tight situations".
I hope this help.