I believe Barcelona will make signings this summer, but they have to be careful not to sign players that they don't really need.
Do not worry about Barcelona, they will not spend anything more than what they can afford to. Even if the price is high, they will divide it for several years to reduce the charge.
Barcelona is one of the top clubs that always has financial issues. The salary of the players these years contributed to that in addition to the bad management and no title to add money to the club..