Volatility is your friend where it comes to making money relatively quickly, but you would also have to understand how to actively trade, use various indicators that can indicate momentum reversals and when the buy vs. sell equation is shifting one direction or the other or even getting your hands on inflows vs. outflows data, same as you can with any other investment.
The real interesting part about the crypto space in general is Bitcoin is King Kong, and most of the rest of the space ultimately will follow it. If Bitcoin is going up aggressively, so will most of the rest of the crypto space. Most coins likewise will also go down not long after Bitcoin begins a downtrend. There have been some interesting patterns that people who watch the space closely have picked out.
First, it's that there appear to be 4 year cycles with bitcoin. This revolves around the miner payout halvings that happen approximately every 4 years. Not every bitcoin has been mined just yet, and miners are paid out in bitcoin, but every 4 years, how many bitcoins they receive is cut in half for "winning a hash". Bitcoin miner payouts are ultimately mildly inflationary for the asset, and as the market goes crazy going up, miners will start to sell their won coins into the strength of the market, which dilutes the market some. Although aggressive upwards markets tend to also have buying pressure fade almost as fast as it started to push it up... so there's that as well.
But still... it seems every time Bitcoin makes a massive upwards move in a bullmarket that lasts 2-3 years (and the most aggressive upwards movement tends to be in the year and a half immediately following a halving), after it hits its ultimate peak of that 'cycle', it can spend an entire calendar year grinding downwards in price.
The last halving happened almost the same time COVID lockdowns began in March 2020. It nearing 2 years after that halving now, in all likelihood the peak we saw in November may very well be the crypto market's top for 'this cycle', meaning it's time to brace for the next calendar year of it grinding down in price.
Good tip, if you go on something like TradingView.com, it's a free stock and crypto charting site, you can use I think upto 3 indicators in the free version at any given time. If you zoom out, maybe so where each 'candle' represents 1 week of trading, then put on a simple moving average indicator. It will default to drawing a line of the last 9 candles averaged together. Change that setting to 200... So you're looking at a very, very long term trend line that is the moving average price of the last 200 candles.
You will see that every time the crypto market hit absolute bottom, the price basically came down to meet that 200 period moving average line (again, with the setting on 1 candle = 1 week's worth of price movement). If you want to maximize making money on just about any crypto coin that isn't an absolute scam (stick to the major ones that most of the market seems to agree are legitimate projects--Bitcoin, Ethereum, Cardano, MATIC etc) wait for bitcoin to drop down to that 200 period moving average, then leverage buy as much as you can. Within 3 years after doing that, you will have massively multiplied your initial investment.
That being said, if I had to guess, crypto is currently is entering its longer-term bear market. I wouldn't want to touch it unless there were a way to trade options or even found an exchange that allowed U.S. investors to short sell, because when the market is choppy and you're a decent technical trader, you can make money on all the little dips and rises it makes because simply longing anything in crypto and leaving it after it's already spent most of its long term upwards momentum is not a great idea. It will take 3-4 years before its price overtakes where it is now in all likelihood if my assessment is correct, and the largest money making potential is of course at the market bottom, not somewhere near a recent peak.