someone who says he has 1 million satoshi (0.01BTC) means he has worked for a lot of days on faucets to earn that and you are suggesting him to through that all away with gambling.
gambling is not an investment and most of those who gamble are losing their money, just remember that the house always wins.
So maybe investment in house will be a good solution ..
For example, here:
https://www.moneypot.com/
moneypot is a gambling site
Very good observation!
However, there is some additional option - you can invest your own resources and have a stake in the casino. In other words you can invest in house edge