It is not a speculative coin.
They buy it and keep it for years, for a lot of growth.
If you can spend a lot of money and wait so much, then it will be a good investment.
If not, either forget about it, or try to trade on cheap coins.
And for this you need to be able to read graphics.
Not much only $500 I can invest now and I can hold it for 2/3 years. If I don't have much money then I will not invest in Bitcoin? I'm not clear.
Bitcoin is a really long term investment. I'd suggest you to put a part of your deposit in bitcoin and make a deep research to find 2-3 promising projects to trade on. The main word here: research. Read more forums, websites, analytics, books, read again and again. And a personal advice: be patient and never take part in panic sales)
For the new investors, the only advice which can work in their favor for the rest of their lives is to keep on gathering as much amount of knowledge as they can as this is the only thing which will help them at time when they need to make some decision. Other than this, all the new investors need to practice controlling their emotions as emotions play a key role in this and you need to keep your emotions under your control.