Only for scams involving big money.
Billionares screw up their poor investors in their home countries and abscond to countries like Britain who like effortless free wealth! Example Vijay Malliya and many from India itself! Bitcoin is very useful for such rascals to hide and transport illegal money!
it is very simple, all crypto currencies not backed by governments are only good for those ones who want to escape the legitimate monetary systems.... and don't want to pay any tax!