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.
BTC will remain exiting always and their are ways to keep earning from Btc . Sometime their is a period of slacksness as observed currently else due to volatility it rises and fall . So you got ample opportunity in this volatility to make money for yourself . Keep on investing and hold it as well.