Well first its pretty stupid to compare the ROI for any investment to a ordinary savings account which underperforms almost every other investment strategy except converting a commodity to greenbacks and stuffing them under your mattress. In the late 70's and early 80's you could get CDs at a 10% return or more. These rates mirrored the rise of CPI so using it gives a ballpark estimate (before taxes of course).
It would be considerably worse than inflation since deposit accounts, see 2010-2017, often pay well under inflation and sometimes pay almost nothing. $3k-$4k range is probably accurate. In an S&P 500 index fund, it would have grown to about $120k. In Bitcoin, assuming you had waited until 2009 to invest it, a million or more.
CD's when ComputerBob said were the glory days with 10% . End game they will tax the deposit money if nobody spends. They will say in the beginning it is only for a short while.