Do you think ever-increasing centralization is a cause of concern?
no, because as long as there are coins like bitcoin, monero, and other coins that still use POW. centralization is just a complement in the crypto space. I don't think centralization is bad, because we still need it. without the help of a centralized system, crypto would not develop as rapidly as it is today. What would be the impact of tightening regulations over the entire crypto/Blockchain space?
The impact I feel the most is taxes. because the main purpose of regulation is tax. adoption drives regulation and eventually crypto will be controlled. in the future crypto will not truly become decentralized as regulation will govern the crypto space.Will it still be able to survive? Your input will be greatly appreciated. Thanks in advance. 
even though the regulations are getting stricter, crypto is still surviving. but what worries me is whether the hype will be the same as it is now?. crypto is noticed by the whole world today because of its decentralization. but if regulation could make crypto centralized, it would make the crypto space very different.