To summarise.
- De Jong would prefer to stay at Barca but if they try to force him out he'll make a move but preferably to a CL side
- Barca have enough players in midfield that they could manage without him given the likes of Gavi and Pedri coming through and Kessie signing on a free
- Barca need the money, he has 2 years left on his contract and he's one of the only players they could get decent money for (excluding the la masia prospects)
- City have distanced themselves from a move
- United are interested but he'd need convincing to go to a side in either the Europa or Conference league
I think the only real thing that points in our favour are that his high wages and the high transfer fee may put off other clubs. His wages are reportedly £200k a week after tax which would be roughly £365k per week before tax in the UK. At most top sides that's either towards the higher end of the wage structure (e.g. DDG and KDB) or above their wage structure (e.g. Liverpool or Arsenal).
If he doesn't want to lower his wage demands significantly then we might be his only choice as I doubt Bayern would match it, Juve won't be able to afford it (and could just sign Pogba on a free instead) and possibly even PSG may not be keen if they give Mpabbe a crazy renewal.