Let me say you have said it all, but let me correct some impressions, anyone that loses interest on bitcoin has lost interest in every cryptocurrencies, because bitcoin is the strong base of cryptocurrencies, anything that makes the price of bitcoin to increase that means every other cryptocurrencies have the hope of getting increase at any time, I may say that the price of bitcoin controls other cryptocurrencies prices , because I have not seen or noticed any coins who has stayed up to one year after being launched pump up by itself without Bitcoin being increased first, I know that coins increased during the time it's being launched to attract a traffic's
To be honest what I think that is even we know that Bitcoin has the guarantee of profit for long term investment, but if you want to do the short term trading then I will say there is not much different between the Bitcoin short term trading and the other cryptocurrency.
And in this case, if someone loses money while trading Bitcoin in the short term and loses interest in Bitcoin because of this, then I would say that it is his personal mistake, otherwise he would have kept long-term investment in mind, and in this case, I would also say that he is more likely to lose interest in the entire cryptocurrency industry for that period.