Quote from dakoo:
does anybody have any idea about cyprus and their visa regimes?
Look on the immigration websites of the government. It's inefficient asking here for visa rules, it's a website of traders not immigration lawyers.
I would say Dubai would be best: cheap cost of living nowadays post-crash, relatively relaxed visas, low tax, and there are some trading arcades. Singapore would also be good if you can get a residence visa and the cost of living is not too high for you.
How about start in Dubai, then if you make it bigger (500k+) in a few years, move to Singapore.
UK is hard - unless you have relatives there you are probably not going to get a visa. In future though, you can get a business visa if you bring in a bit of cash (I think it's around £200k at the moment) and keep it in a UK bank. Also, UK is a tax-haven for non-brits - no tax on foreign-source income (i.e. any trading done outside the UK). However the cost of living in London is pretty high, a decent 1 bed apartment in a good area is £2k per month.
For traders I'd rank the locations as this:
entry level: Dubai, Moscow/St Petersburg, some parts of Eastern Europe (with the low/flat taxes)
2nd tier: Singapore, Hong Kong, Monaco, USA, UK (if you're British), Dublin
Top tier: UK/London (if you aren't British), Switzerland
Almost anywhere else is either high tax, or not that pleasant to live in or trade for a living from. Places like Thailand, the infrastructure and business support is simply not good enough to be a pro trader.