His family has accumulated wealth over the years.

Accumulated : gather together or acquire an increasing number or quantity of.
Drained : cause the water or other liquid in (something) to run out, leaving it empty or dry.
Squandered : waste (something, especially money or time) in a reckless and foolish manner.
Amassed : gather together or accumulate (a large amount or number of material or things) over a period of time.
Dispersed : distribute or spread over a wide area.

Antonym of Accumulated is Dispersed