You can buy now. For bitcoin it is not a big price right now. But it will recover it's price very soon. If you buy in this time, hopefully you will be profitable. So don't late buy as possible for you. In every day buy little amount and gather it for big hitting.
We could definitely buy bitcoin or other cryptocurreny as soon as we have the budget and the time to invest and to buy. But we also need to know that it is not an assurance for us that would earn as soon as we start investment it is a process of earn that we need to learn and to have in time to be successful.
Financial investment is a difficult and successful process that does not come to those who are lazy. I believe that cryptocurrency is an opportunity market and investors should have clear strategies when entering this market, determining long-term investment and sticking to the market will help you have better direction.