Hold on, but if you must buy now be wise to use spare income.
Apparently, your last statement is the inly thing that isn't questionable right now. Investors are always advised to buy with spare cash or what they can afford to lose to ensure they can stand whatever turns the market takes.
From the look of things bitcoin price will not come up soon, I guess is better to hold on till when it will show strong signal before putting in money again to escape losses and people who their investment is long over due are already victims of the Price dropping. We should try to be careful this period that bitcoin has not direction. Imagine a friend investment $2000 but what is currently left in his wallet is $400, and the deep is still bearing down the nuds.
At this point, it seems you bought the udea of buying when it's high. That's what I seem to get from that and it doenst make a lot of sense. That would mean, getting in the market when the most profit that could have been made has already been made. The market at the moment though bearish, has been showing some bullish candles and that's good news after the time it took to dip and stay really low.
Should your friend had bought $2000 worth of bitcoin a month back, he should be on profit by now and not $400 as you claim. The bitcoin price now is at $26.8k and that's some good news.