Let me explain why you can't buy 100,000...

If you see how much bitcoin are holding the main exchanges, you will realize how big is the amount you are asking for:

https://coinmarketcap.com/exchanges/bitfinex/  <- 66,417 BTC
https://coinmarketcap.com/exchanges/coinbase-pro/ <- 116,911 BTC

If your investors have $872,508,000 then the best way to invest is to buy other alts and not only bitcoin.