That's a lot of money to trust someone to do the bet for you. Why not ask first the people that are close to you? got any friends or relatives where you'll ask them to bet for you.
At that part, you'll get to have a peace of mind. Yes, you'll use an escrow as a guaranteed to this bet. But what will happen is that the escrow will still send the money/btc to the bettor that will do the transaction for you.
How are you going to secure that person will really bet that amount and won't run from you?
Checking OP's post he's been doing this kind of betting he is a high roller with a passion for taking risks
I’ve turned $1,000 into $100,000
I’ve turned $6,000 into $80,000
I’ve turned $11,000 into $550,000
and recently I’ve turned $4,000 into $90,000
How do I get over the countless failures? I’ve been chasing the $1,000,000 dream for years.
I don't know OP's business or job it seems he can maintain this huge betting unless you are printing money you cannot keep up betting huge amounts of money even if you're good, even if you win your $1 million you will keep extending your luck and keep satisfying and fulfilling your dopamine level.
I hope he finds someone and they made a good deal since he mention escrow I hope he can find a highly reputable escrow, we're talking a huge amount of money here.