Large S/L Idea

I had an idea and Im sure most will shoot it down quickly but I must mention it.
If I supply 100K dollars in a brokerage account and set my forget about S/L's and wait for the trade to go my direction. Hopefully, I am trading in the trend and catch the up/down momentum. I currently only trade the GBP/USD so it's active during the eur session around 7:00am (est). I am interested in taking huge down-swings and with that kind of money, just wait until it goes my way and close for a profit.
Does this sound stupid?? I rarely see the pairs trade above or below 200 pips, so I would never lose??
What am I missing in this strategy??

lol, not again . Demo it for at least 1 year and show me your results.

Sounds very bad. If you have some hidden secrets that you haven't written, reveal them first. If not, then...

You'll need more than one account to blow through to go for a year.

If GBP/USD rarely moves more than 300 pips in a day movement and I can absorb it b/c of the money, then couldnt I wiat unitl it goes my direction and ALWAYS profit.
Someone explain why this wont work, Please!!!!!

You need more than hope - just start plugging away at gaining market experience.

The problem is, how can you be sure that it will come back after moving 300 pips. It can go 1000s of pips in one direction, day by day.

Yeah imagine buying EUR/USD at 1.60
Have fun waiting till it get's above that level again.

No. He had sold at 1.60.