The highest wagerer is currently at 70BTC, that's higher then I'd have expected. I was going to put in 0.1BTC and get a bot running to gamble with 0.001BTC and see how high I could get (with 0.01 odds) but that seems a bit dishonest - though theres still an equal chance to gaining and losing the same amount. I'm not sure if anyone's done this though (there's probably a slim chance you'll get profit from it or your betting will at least last a bit longer on the site).
Yes, this is pretty huge amount to wager just in a couple of days actually so may be around 3 days or something he already got that amount and I know this will be no chance for me like low player to wager that huge amount. But to have 0.1 btc wager with 0.001 and 1.01x multiplier, I think you will lose fast, you need to wager 100 times to cover your initial bet mean while it is better if you use 1.1x multiplier. But all of this is not a guarantee you can achieve that. But basically when I have 0.1 btc with 0.001 btc, the wagered amount will be around 4x-5x. Never hit more than that ever, but may be you can try it