You are young but you are so smart at age of 13 you buy bitcoin and you want it to hold. Good for you my dear. Hold your bitcoin and you will wait at the right time to sell it. I know you have a big faith on bitcoin thats why you invest in bitcoin.
I wish I was that smart when I was 13, if this young person really decides to invest in bitcoin and it is capable of holding his coins then he will surely become a success story in the forum, however as we know it is not easy at all to hold our coins especially when the price crashes like what we saw some years ago, so as long as he also believes in the technology and it is not here just for the money he will do fine but if he only cares about the money there is a chance he will lose it if the price crashes.
Well not all 13 years has the mindset to save money by investing it in bitcoin or any other crypto for that matter. If all of us will do, then by this time we could all be millionaires, there could be some exceptions though, specially kids who have been raised in a family wherein he it being guided by someone and teaches him the value of early savings, not just in crypto but maybe in stocks.