Bitcoin is the world's first decentralized currency system and as such is resistant to regulatory capture or inequitable policy alterations solely to benefit or at the behest of a small but powerful interested group.

Nothing is 100% incorruptible. Bitcoin may have a serious vulnerability... but thousands of extremely smart people have been trying to find such a thing and have been so far unable to do so.

If he buy a ton of BTC then BTC price will skyrocket.

Let's HOPE someone do that, we will all become rich

Bitcoin is corruptible to the extent it's centralized.

Client development is centralized so the developers and the code reviewers can issue a malicious binary and get profit.

Mining is centralized so the pool owners can steal coins.

The exchanges are centralized so exchange owners can steal coins.

The escrow services and online wallets are centralized so owners can steal coins etc

I included ecstasy because the original use was as a marital aid touted by psychiatrists in the 70s as a miracle marriage saver. Not so much anymore.

Ecstasy as a fix does not work because its a break from reality. Fiat currency is also a break from reality, that is why those currencies always fail. Bitcoin, on the other hand, is "honest" money. It does pretend to be backed by anything but stands on its own merits. It is open-source, secure and technically sound  (so far). It tries to address reality instead of pretending there is no problem with the currency system.

Not a problem, we would already be super super rich

stop talking about drugs. this board isn't about them.

While I don't want to say Bitcoins is incorruptible I do see ways a government or wealthy individual could bring it down. 

1) Get enough computer power to break the bitcoin chain by taking over 50% of the computing power.  I don't think this is practicle with how powerfull the system is now.

2) Buy an resell lots of coins to make wild price swings.  This would undermine the stability and merchants would stop accepting it as a form of payment.

3) Make it hard for people to purchase bitcoins by blocking sites that are exchanges on web filters.

While these are not 100% guaranteed to work I do think they could cause issues.  I think number 2 would hit the hardest as people would be trying to buy and sell hardware as the price moved around like what happened when it jumped up to $30 a bitcoin.