Am convinced that Bitcoin and cryptocurrency serves as a means of Exchange for trading.
I am not sure what you mean here. If you use translation for this, it may be a good idea to look for the subforum in your language, maybe somebody can explain there better.
If you refer to trading/speculating and exchange between Bitcoin and altcoins, then you're wrong.
If you refer to Bitcoin as being a coin (coin = a tool/helper for exchanging your work for various goods and services), you're not far from the truth. And I'll go on this path.
Am still trying to understand the clear difference between the both and know how to place them in their separate parts..
Bitcoin is "the firstcomer". Bitcoin has the strongest network (so overly expensive to break it that it doesn't worth to even try). Bitcoin is accepted in most places. Bitcoin is the "base currency" in most cases one wants to buy altcoins. Bitcoin price is fluctuating a lot (in both directions), making many tell that it's a risky investment. Altcoins' prices fluctuate even more. Also the vast majority of altcoins are clonecoins/shitcoins, scams, project that bring nothing new or lie about what's there, just to get you invest (and lose) your money on them.
Bitcoin is not only a coin, it's also an investment as you can see. And same goes for altcoins.
But while people call them all cryptocurrencies (even though some are just tokens, not even proper coins), they are highly different.
In the same way people were using sea shells as coins at some point in the past, just to find out that it's not a proper tool for the job, also most altcoins are not the proper tool for the job and should be avoided.
This is imho what makes the difference between Bitcoin and crypto.