It is better you invest low amount of money on bitcoin right now. If your salary is $400 monthly, you can be investing like $20 on bitcoin which is 5% of your monthly income . The price is high already but there is tendency that the price might go up. If you can be patient, wait until the next bull market begins after the coming bear market to invest more. I may not be absolutely right but that is my opinion.
You are actually right mate, this is same thing I keep telling anyone who might be fascinated by the bullish momentum of BTC and wants to jump in now and buy. The price is currently high and of we remember correctly, we are only supposed to buy low and sell high. There's actually a risk right now in buying Bitcoin at a high price as it might drop and your investment would take longer to get back into profits.. it's better for op here to invest little like you said and wait for the next bear season to arrive.