First things first. This is topic is not to create a FUD rather a true talk to what is happening right now.
Can bitcoin get a hold to its investors to stay on him and keep believing on the power of the king?
For me, I can feel that investors are now turning their back against bitcoin because of this main reason. Tx Fees are very high and slow. It is not practical to be used on daily transactions which I think the first purpose why bitcoin was created.
I think all of doubt that happened now will gone if lightning networks arrived. Though there are issues in bitcoin's fees, I think it is not enough for some of investors to pull out. But if all investors will turn back, I think that will be disastrous for bitcoin.