Just wanted to know if there is a difference when buying bitcoins through an online trading platform like (Plus500 or eToro) vs. sites like Cubits, Bitstamp, coinbase, etc?!
Yes there is huge difference between buying real bitcoin from bitstamp and coinbase like trading platform and buying some virtual bitcoin shares in etoro like sites.
What you can buy in coinbase, you can easily withdraw it out to hold or use as you like while whatever bitcoin you will have in etoro is only tradable not withdrawable.