Now you have $100,000 in your account, pure savings, and you don't need this amount of money to cover your daily expenses. Obviously it's good/free money to use at will. Let's say if you deposit the money into a bank and the annual interst rate is 3%, you will get a steady interest income year by year. If you use this money to buy Bitcoin, let's say the BTC drops to $17,000, you'll buy less than 6 Bitcoins. In the long run, what would you do with this money ? And why ?
It's easy to talk about hypothetically $100k. If such a dilemma arose in reality, it would be much more difficult to make a decision.
I would immediately reject a bank deposit, because their profitability is very low, often even lower than inflation. What is the point of keeping money with them if they will only depreciate, while you have no physical access to the money and the bank can say
goodbye at any time and you will say goodbye to your deposit.
Buying bitcoin during the fall, even for seeming simplicity, is also not an easy thing. For most, the desire to buy btc arises when growth is visible and this pushes to buy before it's too late. During a fall, the situation is reversed and fear deters you from buying, so you are unlikely to buy btc for the full amount. I admit, partial and phased purchase.
In the long run, of course, of these two options, only bitcoin will show good returns.