Antonym of THRIFT

Thrift : the quality of using money and other resources carefully and not wastefully.
Purchase : acquire (something) by paying for it; buy.
Destroy : end the existence of (something) by damaging or attacking it.
Waste : use or expend carelessly, extravagantly, or to no purpose.
Invest : put (money) into financial schemes, shares, property, or a commercial venture with the expectation of achieving a profit.

Antonym of Thrift is Waste