UKIP basically committed political suicide when they got what they wanted—BREXIT. The recent general election results, where the party got 1.8% of the votes, proved that. Plus Nigel Farage knows the game is up. Recently he said he wouldn't be standing for the position of leader.
The way for the party to have stayed alive would have been to develop an equally compelling policy while they were pushing for BREXIT so that when BREXIT became a non-issue they would have had something to fall back on. But UKIP were never much good at thinking ahead.
Politically the party is just a hollowed-out husk, but it is still quite a big brand name, so if it were able to find an issue to campaign on, there might be a chance of reviving it. There is even the possibility that this is now happening after reports of a surge of new members, most of whom are thought to be anti-jihadist civic nationalists who strongly oppose Islam.
