What i have problem with is objectivity. If it's freakin egg and spoon race, than do not let someone glue god damn eg to spoon, or someone compete with custom made spoon that can safely carry eg in any position you like etc. Spoon is a spoon, and egg is a egg. "Most users on one game server" is exactly that...not freaking login server!
I lost faith in the Guinness Book of records when they started allowing geographically-distributed "x people doing y" type records. How can they be sure that x exceeds the number of people in the world randomly doing y independent of the record attempt?
2. The world’s highest valued encrypted digital currency;
I don't think Bitcoin would qualify for that one because it is not encrypted. The USD probably qualifies more as an encrypted digital currency more than BTC does.
Bitcoin uses Cryptographic hash functions and digital signatures, but not encryption per se.