Sir,
What I understood is that you need a website to calculate online profit ratio of bit coin but do you want to integrate any API to calculate ratio of profit? Do you want to maintain local history to calculate profit ratio? Do you also want to add reviews rating module at website as in reference website?
According to my team, it's 60-65 working days project depending on the number of revisions and response time from your side, I am adding few days margin just for the safe side but if there are no delays from your side or not much revisions, then surely we can deliver it earlier than the given time-line. In any case you will be seeing progress time to time, so you will be in the loop & provide us feedback. I will assign you one experienced team lead & dedicated team of developers, so you can have one point of contact and I hope you will understand that quality of work is more important than rushing the project completion.
Please let me know, if you want to work on hourly basis or should I give you total cost?
Look forward to hearing from you & start further discussion thru' private chat.
Regards,
YK
LEADconcept