I've discovered Bitcoin few days ago, but I am skeptical about few things, why would I invest money in Bitcoins at the end of the day,why would I convert money into Bitcoins?

If I want to buy stocks or invest money I can easily invest with real $. Why would I convert my $ to bitcoins?
If I want to gamble , I can simply gamble on websites that require $ as currency, why would I convert it to bitcoins?
What's the difference between Bitcoins and dolars? What does bitcoin bring to the table that real $ don't, less taxes, more income?

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Hello family, I need to take an informed decision on this issue

With the present challenges with the blockchain technology and its present congestion ,

Is it still safe, wise and as profitable as before to start a fresh bitcoin investment?

I'm thinking that investing in a number of the other several altcoins might be much better

Pls I need your thoughts and opinions on this....thanks

Will it continue to rise continuously now, or will it suffer big downfall like what it happened after the canceled fork?