LOL!

Converting to a SCRYPT coin because you're concerned about 51% attacks? Too much roaving hash on scrypt multipools etc for those to be any more secure than BTC, and as mentioned, an attack on BTC will impact all crypto.

People seem highly confused about what a 51% attack involved:
1. Intent
2. Concerted effort to falsify transactions which will later be nullified
3. >50% of the overall hash rate.. Not just 51% of the current network hash rate, but >100% of it.. You need to run an ALTERNATIVE blockchain that's solving things faster than the real block chain, meaning you need more power than the entire existing network.. Hypothetically you don't need all this hash rate yourself, you just need to be able to split the network and have access to both concurrent networks.. Of course this poses massive logistical challenges.. Also - if Ghash.io were to perform a 51% attack, they would effectivley have to disappear from the network to start their own fork of the blockchain, which would be pretty obvious. People would know it was coming.
4. A crapload of investment in mining equipment (millions of dollars worth), which will severely depreciate if you succeed.
5. Risk: People would be VERY unhappy.

Q: Who stands to profit from this?
A: Only someone enormously wealthy who stands to benefit from the destruction of Bitcoin in a degree that exceeds the cost of duplicating the entire network's hash rate. Not worth it for anyone else.

Just a couple pennies that I'm giving out.