Don't invest money you cannot afford to lose.

I would personally never invest that much into a single alt-coin, but maybe you are rich or something and 10K is not much money? Then by all means.

I don't think any alt-coin is all that great for long term investment. I think stick to bitcoin, because if bitcoin fails petty much every alt-coin will fail as well (at least in short-term).

While I believe that signatum has a good potential to rise to 0.50-1.00+, of course nobody knows for sure. If enough big whales decide to cash out they can destroy the coin in a matter of hours and may take months if not years to show recovery if ever. It's probably not going to happen as it's not premined, but you never really know what others are thinking.
thank you very much for your kindness advices............I come from Vietnam and I would highly appreciated your consultant

If you are a newbie start with a few hundred dollars maybe a thousand at the very most (if you can afford to lose it), if it goes x2-x3 within a year I'd say that's a good investment, if it goes much further than that's awesome, but never expect too much either as you will be disappointed.

Also don't forget the nature of cryptocurrency is extremely volatile, long term investment is better to do in real world with diversification & tax free accounts if possible, you don't get super rich but you typically won't lose out in the long term either.

Anyways good luck, if certain conditions are met in the next while than I do believe signatum will see success, but there is no guarantee.