if with just 10BTC can make you become a millionaire , what about people who own 1000BTC? i think they'll be a quillionaire

I think not because I believe that you will need allot more Bitcoin then that. 10 bitcoins is not nearly enough to become rich from so you need to find a way to earn allot more bitcoins.
yeah 10 bitcoin will never be a millionaire, but if you think prices in 2030 will be $100,000, well. I would say it could be a millionaire. but in fact it is clearly not possible. 100 BTC may at least be able to become a millionaire in 2030