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
I've got out of the Multiply BTC bonus a few times with a 25x rollover requirement. I don't like using the low multiplier strategy for this, I'd rather just bet normally. Trying lots of low multiplier bets just reduces the probability of variance being in your favour. The higher the number of bets the closer to the expected value you get. That's the same reason bots and scripts reduce your chances. I prefer to make fewer larger bets.
With something like bet high and bet low button, I can still manage it to get few rollover but if only there is only one button and I need to click to change it again then it seema like they are cheating on me.
When I change the button from high to low the result will change drastically too, so the result almost 80% losing. That is why I do not really like wagering competition anyway. Sorry no offend

I hope you understand that it's just a coincidence. There is no correlation whatsoever between your betting HI or LO and the probability of winning a bet. I'm not urging you to take part in the wagering competition, but your reason for not liking it looks very strange to me.
I rarely play HI/LO game on FreeBitco.in, but just now played couple of minutes and I had 8 greens in a row with 2x multiplier. I've seen much more greens in a row but never on this site. I mean, this can happen even with the 5% house edge the site has.
I am positively know that everything is coincidence on gambling site but I tried it and on the most site, this always happened, I do not blame anyone from it due to the loss because sometimes of the accidentally clicked won me some pretty huge cash too. For the wagering competition, I do not want to take part on it just because there will be no enough balance to beat any big whale here or may be on most of the big site. This will be pointless battle with them