I dont know dogecoin plan or structure, but there is said "Production will slow down once the 100 billion mark is reached." https://www.eobot.com/doge and now 112 billion doges is mined https://coinmarketcap.com/currencies/dogecoin/. Somebodies believe when production slows down, the price goes up.

Please do that some day.

So if you could buy 0.235 BTC with 600 USD, when you started, you have made only 41% of that. This is a hook of cloud mining. Usually you made good profit only if price drops so much that difficulty drops too or at least dont rise for a long time and then price goes up again. I recommend to just hold in a wallet that pays interest, like freebitcoin. Interest is only 0.0109589% per day (4.08% / year), but you can withdraw when you want. It is like partially cloud mining, because they mine too (9.065 Petahashes ATM) and pay interest from their profit. Interest is much lower than cloud-mining companies advertise, but they take all the risk too. Their wallet is also cheap to use, slow withdraw only 0.00004307BTC (0.41 USD).

So have you mined from july or august? How many days have gone, when you reached 0.11BTC with 4 TH/s?

I do not doubt whether you have 5.5 TH/s or not. Iam doing my math and 26.07.2017 bitcoin price was 2550$. Actually you could by 0.235 BTC then, so you are only halfway now.

But 4 months ago you could buy 0.20 BTC with 600$! Are you telling truth?

Price was under 3000$ https://bitcoincharts.com/charts/bitstampUSD#rg120ztgSzm1g10zm2g25zv