Anthony P

It's pretty tough to hit 100!

From the HH, he's probably betting a low PP 33 or something. On the flop, he bets all overpairs, FDs, and straight draws, so we can exclude 88. How many 10s do you think he has in his range, considering the preflop action?

The turn stab with nothing can also be indicative of AK, AQs, etc.

As I live and breathe. The first 120 seconds of Paul Senter's: http://www.runitonce.com/pro-training/videos/senter40/ should give you one example of a multitude of considerations. His intonation at 1.5 speed is impeccable. 

OP has a problem I can identify with but can no longer play with, being in the States and away from tourneys as deep as even like 300 players. Sigh. I remember the FTP days, with 1k runners galore in 3.00 no rebuy 9 hour marathons. The 200$ I scored in 37th place of one with (gasp) 3900 almost got me to the WPT in Los Angeles during the best satellite day of my life. But I digress. 

He might be playing in fields that are way too large, where early accumulation of chips is absolutely essential and without which the rest of the tourney does indeed boil down to the that middling ~35ish stack that needs to win about three flips over 8 short blind periods to contend on even a minor level.

Yes, amazing hand-to-hand play does come into play more so in these deep stacked tourneys, but so does variance and getting strong hands in key spots*. In a lot of videos I've seen, the pros admit this themselves.

Remember, their success typically comes from playing many, many tournaments at a time over the course of a day, making proper decisions and maximizing their ev when the variance presents itself. The 2 or 3 hands you may choose to re-steal or bluff typically won't define the entire tourney but the chips you make there will aid during the times of previous mention +ev bingo spots like that time you limped the BB with 66 to the chipleader and flopped a set. No fancy play there but of course having a few more chips will help when you get more**.

The long and short of it is basically to try a smaller tourney or MTSNGs(sic) where you can narrow down the variance by lieu of a shorter time span. An important key to playing MTTs is finding the structures you like to play and have an edge in. I mean, you got those guys who play exclusively HU MegaUltra Turbos Sngs, so who knows.

OP might not be one of those players who thrives on steals and resteals with abandon. Not for nothing, and not to simplify it in any way, but those types of players usually present a pretty wild image for most of the time on the table, not ultra-selectively, and that's why it works. If OP is talking about proper mathematically induced shoves and raises, Jono's play in his Bigger 105$  video ( http://www.runitonce.com/pro-training/videos/jono5/ ) illustrates these pretty well, through practice and I believe some theory or theory bred through practice.

Hope that helps.

Cliffs:

-Cut your cloth to suit your needs, my Mom always said. 

-If you try to switch to style of play that makes you uncomfortable,
expect to take some losses until you adjust to the new leaks that come
with it, simply put, as well.

*Also of note is one of my sentiments, echoed by Paul Senter, of proper decision-making throughout the tourney. In a longer tourney more of these are required as well, and more of those will require more mental stamina, of course. Duh. 

**Jono Crute's mantra of your chips being worth more put into stark reality here considering double-up math, made even more awesome by our flopped set up there.

Is this the final table? What's the payout?

If it's the final table at a micro stakes game, it's probably a lean towards 1)shoving with that stack 2)open folding and waiting for a better hand in a better position.

I'd actually say 2) is better.

There are 4 players with 30BB+ after you and a 51BB stack in the BB. Maybe it's an odds on call to shove, but given these types of tables, you have at least 10-15 hands to pick up at least an A or a K or something in better position rather than trying to push through a medium-strength hand, full ring speaking. And see that you have a vulnerable stack in the BB when you're Button, which is a big steal spot. 

Maybe separately this doesn't make sense, but in the moment, I think it's the best play, a fold.