The most important thing is to understand the situation. Start as soon as possible. This is the only way to achieve something.
Indeed, bitcoin has met much of what I had expected if not in the manner I wanted, but there is nothing wrong with that and thus we should not wait to put our money in bitcoin if our beliefs are good.
For those who are willing to make money from bitcoin, there is money to be made from long term holding and a chance to indulge in the next generation of currency which is censorship resistant and decentralized.
There will always be some doubts in mind, so start small and eventually keep increasing your stash of bitcoin.
Those who crave knowledge and dig deep enough understand where to search for something on the market and especially how Bitcoin is being the bulwark of it all - it is the most stable investment of them all.