Do you really believe network difficulty will drop soon? Come on, seriously? We have tons of asics to be soon delivered from KNC and other companies. Tons of ghash/s paid overpriced. I say difficulty will grow even faster than now.

I have some amount of bitcoins, I always look for a good investment but currently in BTC asic mining world there are absolutely NONE ! I'm not some enthusiast to care about network security, I simply want to earn some money when I invest.

Every offer that I analyse is a huge gamble, every offer gives loss in my calculation or barely small profit (with high risk). Even the Bitfury miners with devices delivered according to promises are not sure to get their money back, not mentioning shit like BFL where you recieve unit after a year and you can say goodbye to your roi - unless you find a sucker who will pay double for your order. BFL even doesn't accept refunds lol, take an example from Yifu. He did not deliver on time, he gives full refund. He is a scumbag as well because he sold our chips to Asia resellers like alibaba.com. That was the reason of adelay and turning his chips into not profitable. I was one of his customers, lucky for me I had "red light" moment when I decided to auction my chips and made some profit.

Recently I bought some GPUs to mine altcoins, your advice is good on that. My analysis showed that this is the only shot for now to go on with mining cryptocurrency.

My bitcoins are burning my pocket but I won't give them for overpriced products to greedy asic manufacturers.

Of course I never count on BTC value rise with my calculations because this is retarded. If you want to speculate with BTC value just buy BTC, not a miner. You will earn a lot more if your speculations were right.