I have been a fabriholic for at least 50 years. The solution is to sew faster. I try to be very selective with my purchases and make a lot of charity quilts. I am only moderately successful, but I have less fabric than I used to (125 boxes when I married DH). Fortunately, DH is very proud of my work.
PS Velveteen is good in a quilt. I have used it many times.