Well its and interesting topic.
As per me there are various kind/types of skill required in crypto space apart from Signature campaign. These includes

• Mining - If you are invested in mining you are helping in securing the network
• POS / DPOS - This is basically HODLing and getting some money out of it
• Masternodes - Well VPS server have never been so popular. if you know some basic Linux knowledge and can host a masternode then its one of the most desired service any newbie wants
• Network Forking - If you know how to compile code, then you have already taken the first step in creating your own blockchain. There are still many projects who want to branch out of some crypto and make their own vision. It can be one of the most desired skill in crypto
• Smart contract - Its one of the most easiest and most hyped. Its basically writing some JavaScript kind of logic into a world machine 
• Blockchain for Industry - One of the most demanding jobs in IT sector as of now, where companies want to set up their private blockchain networks which doesn't include process like mining
• Educating people about Crypto & Blockchain - Having and making YouTube videos is kind of a skill

Now coming to the skills people posses
I believe most of us in bitcointalk have knowledge about Mining, POS or DPOS 
People with the knowledge of how to set up Masternodes are very limited in India 
Smartcontract - its way too common, any decent programmer can do it 
We have a lot of YouTubers spreading crypto content, so knowledge in this sector is ample
The most rare will be Network Forking and Creating an enterprise level blockchain infrastructure 

About Me :
I myself have knowledge about all the above except Network Forking & successfully deploying it.