Because you can make lot of money in a short time. (and conversely)
If you talk about making and losing money. Then yes I will agree - people who are having blank brains will make mistakes and often these mistakes might cost a lot. Thats why one should invest huge amounts of money into crypto and be cautious about their own gains and when to get out.
Because its good to invest in bitcoin coz bitcoin value is high so people wants to invest in bitcoin and the world is talking about its value.
Yes, it is good to invest for our future. Investing in bitcoin is good choice cause in bitcoin you will earn high profit, the value of bitcoin is continues increasing that's why many investors wants to invest in bitcoin.
That is technically trading and not investing. Investors would buy a coin and then dump it one rise and then never look back - classical pumpers who move from one coin to another as whales. Traders go back to stable altcoins every now and then. They watch the market trends and make decisions based on their experience.