Crypto is overall unpredictable not only Bitcoin, no risk no gain, if you want to profit then you have to must be taken risk.
Investing in Bitcoin it have bright future but not all altcoins are potential for future. What's the future you see in luna,doge and tron, these are you already invested?
Risk is Not specific with only crypto but is available in every business but we have invest in the place where we think that oir investments will me more safe than other place. This is why it is callled that do your own research. There are many metal available but Gold is considered more safe and profitable. similarly many currency available but USD is considered safe and profitable so same in the crypto also. Bitcoin is safe coin so far and whenever we talk about risk so our mean is to invest in new or meme coins which rise and drop chances are much high. we 1000$ become 10000$ in some days or drop to 100$. At once I remembered that these mentioned coins were considered high profitable coins.