Bitcoin is very slow transaction and fee is rediculus then why people bother buying it or considering it. I have £130 of bitcoin and I want to move it and it is asking for £28 network fee. Why should people bother having it. I can't wait to get rid of it when the fee is low.
I don't invest on bitcoin. I agree bitcoin is useless, their only can be used for payment. But many people familiarize on bitcoin, they have more trusted investment on bitcoin.
If you want a crypto usefull for this world, you have to look on ICO, ICO has many usefull for this world for example Bobs Repair, etc