There is no question about it. Your body needs time to purge and eliminate waste. consonantly eating 3 times a day for 20 or 30 years without a break is not good for the body factory. Factories shut down for maint and changeover, stores etc. The body should do the same.
This is an awesome resource. I am definitely going to bookmark this for future reference. I would also recommend reading Applied Cryptography by Bruce Scheneier. You can pick it up in hard copy or kindle on amazon. This book is considered the most definitive reference on cryptographic techniques ever produced.
I would say stop looking for a 'job' and go to work. Full stack developers are in high demand as an independent contractor. You have to get out and hustle. PHD will not help.
This is one major benefit of having a decentralized blockchain. You don't have one entity that can decide one day to shut your account down because they don't agree with you or your policies. I they is why I am really doing most of my social interactions on Keybase which is connected with stellar. Its like what telegram should be with super duper privacy and without all the S*amers.