dealers once up the food chain a bit do stash cash --and lots of it * for several reasons
#1 --they can not put it in banks --leaves a "paper trail" -- and if arrested the govt will seize all that cash --cha ching
#2 things might go bad -- a drug war erupt with a rival group and they lose --might have to flee for their life never to return --best have money to go away and start a lil bussiness somewhere out of the way (or live off of till you can regroup / recuit new muscle and later on try to hit back and retake yer turf)
#3 you might get busted and need a butt load of cash to "buy" a crooked lawyer to pay off the judge and /or the jury to get off --( or pay "outside of you group" folks to whack witness's-- no eye witness or "rat" insider to go on the stand --often times the boss walks)
a large stash of "ready to go" cash is a big time dope dealers safety net.--- smarter big time dealers often stash $100,000 or more in several differant areas in differat directions , headed away from their "base area" of operations --so no matter which way their forced to flee theres money "availible" along the way
many of the smartest dope dealers --buy land or bussiness's --putting it in family members names * thus making a "legit" bussiness that can on paper at least produce a "taxible" income --so that the IRS can not say --uh you live in a high dollar home , drive a nice car but have no source of "legal" income and have not filed taxes showing how you support yourself nor paid taxes -- not paying tax's is one of the govts easy ways to get ya. -- by the family having "bussinesses" --you can say that your a bussiness "consultant" and get paid to "advise" your family that "owns" the bussiness's on what to do .
(thus as a bussiness "consultant" you do not actually have to "be at" the actual bussiness';s day to day * yet you still get "paid" a salary -which you then can live off of "legally" speaking tax wize .

-- of course its a very very good salary you get as a "consultant "--- because of the great advice you give -- uh your "family" owns a car wash bussiness -- your wize bussiness advice -- uh be sure not to run out of car wash soap and wax )