The incentive is that the cost of their debt increases if they don't have sovereign assets. As they sell off their capital infrastructure and their tax base diminishes because they are squeezing the economy to pay debt interest payments people will move out of real estate and equities into assets that they can't tax, resulting in a large subset of the population playing kingmaker in elections, like the greens in Europe, or the ultra orthodox in Israel, who then push for a favourable environment for bitcoin. Other countries will have kingmakers from the dispossessed, whose assets and job security and social status are plummeting, but who resent Bitcoiners as "hoarders", and from those countries Bitcoiners (and the wealthy in general) will flee, taking their capital to favourable environments (Switzerland, Norway, Portugal, any country that offers them tax sanctuary and freedom of movement).