Is there any Crypto exist which will grow like BTC within next 7 years which must be now in pennies?
None. 7 years is not enough to surpass bitcoin given the current progress unless the majority will attempt to take down bitcoin at any cost.
Not with the use-case, not as a currency, but with the positive hope that bitcoin's future is good, more and more people will consider bitcoin as an investment making its market stronger and bigger as it progress.
And you shouldn't wait for those cheap coins to become like a bitcoin someday. Try to play at those coins you are referring and you might be rewarded.