It depends what altcoin you are going to invest to and how long you will hold it. I believe it's possible but it's hard to spot what altcoin is going to give you that return. Just think of $BNB, it was less than a dollar few years ago and look at its price now. No one would've thought it will reach its current price now and I don't know if there is someone able to hold and sold when it hit 3-digit price. Making it possible would feel like hitting the jackpot on the lottery.
Well, questions like this are always easy to answer but extremely difficult to do. 1000 times profit is not impossible but the question soly lies in how to spot the right project that can turn that into reality. I am sure lots of people can make a long list of what makes a project reliable and sucessful but how to distinguish the right project before it succeeds is the key. Very few people are able to acquire this ability. That's the truth.