Yea, it is true. I quite agree with you. People are not really excited or motivated anymore to participate in Bitcoin investment due to the negative trend in the greater part of the year.
No, this is not the truth. people did not lose the interest in Bitcoin. Despite the cryptocurrency price fall, millions started to think how to make money on BTC. They are the future investors.
That is not true Bitcoin is only having a downtrend but it doesn't mean that it can't recover because I know eventually it will rise sooner. Especially now that Bitcoin celebrating its 10th years existence, I think tnis year 2018 is not good year for Bitcoin and to other cryptocurrencies but for sure they will recover from its huge dip. Then if Bitcoin started to rise people will be excited again.