Manchester United is one of the big teams in the Premier League and we cannot only see a season with bad performance so that it will not survive in the English League.
Even in such a bad appearance last season shown by Manchester United I didn't think they would be degraded.
You know in life there is nothing impossible and a big club is only a big club with good finance if their club performs well in league and tournaments so that they are able to get good revenue. In addition, if they have overspendings for player transfer costs and salary as well as operation fees in many years, their finance will be harmed and become sensitive to bankruptcy. It won't happen after one or two seasons but if bad things last for many years, even worse thing than a relegation is possible to happen.
There are many changes made by the coach slowly and I am sure this season will be much better than the previous season.
People see Chelsea doing well because they are based on their performance when they beat PSG at the Club World Cup but it is not enough to guarantee that Chelsea will be much better when competing for titles in the league.
Money is important as it can provide budget for player transfers but only this is not enough to improve a club competitiveness. A good development strategy, then proper human resources from head coach, assistant coaches, medical staffs and players, will combine and work together for a club general success. Manchester United have many problems to solve and not only with their player resources.