Obviously, bitcoin is the original, why would you ask questions like that?
Bitcoin is being used in general while the altcoins are being made for a specific purpose, reason or maybe a developed asset that has similarities with bitcoin. Well, bitcoin has blockchain, no one can get through that, it will be always number one.
Bitcoin is first currency with billion of dollars transactions with less fee and lightening fast network so other altcoins be traded with bitcoin
Lightning Network wasn't an original feature of bitcoin, it's an alter solution to the traffic on blockchain's network.