Barcelona as a business are almost dead but as a brand, they're monumental so there will always be someone to invest in them. The fact that Bayern's best player want to go to them is a statement in itself.
Also, it's always keep good business relationships despite sporting rivalry, case in point is how we are able to buy the best players from Fiorentina. Tossers like Lotito can stew forever while their investments diminish, whilst not achieving anything on the pitch.
Bayern are going to screw themselves but I'm sure nobody will be sympathetic towards them.