It is because the altcoins you mentioned isn't popular... (at least I don't know them).
However the popularity of bitcoin is dropped (see the price for reference).
Thank you for replying
1- Smartcoin actually was popular at first, until the original creator/dev suddenly decided to quit being involved,
and then people gave up too quick and dumped their coins, rather than rebuilding.
I feel bad if people lost some time and money when this happened, but at the same time,
other peoples misfortunes is sometimes other peoples gain. People who buy in low and help to rebuild can gain.
But smartcoin has been rebuilding since then, with a part-time dev, a friendly fellow named psionin,
although he is only part-time, but I reason a part-time dev is better than no dev at all, and psionin
made a scrypt coin into an X11 coin.
I mean, Smartcoin was a scrypt coin at first, but psionin made it X11.
I personally believe that current price of smartcoin makes smartcoin a good speculative investment,
and if/when some other people see that, and invest, and then do some things that they can do to help smartcoin to be a more widely used currency, then the price of smartcoins should go up, and their investments should increase as well.
2- I know the price of bitcoin has dropped, I do not understand why,
but I am thinking that bitcoin has grown much larger than it was in 2013.
The explosion of altcoins, with the vast majority of all those coins needing people to buy bitcoins first,
prior to buying their altcoin, is one indicator of how much bitcoin has grown.
I think bitcoin has grown much larger, but how can it be you are saying that 'popularity of bitcoin has dropped'.
How can bitcoin grow so much, and yet be less popular now than it was in 2013?