Seriously, I think that there’s no way to mine BTC in 2018/2019. The Chinese community controls the major part of mining power, so ordinary users can hardly compete with their hubs. Even ASICs aren’t ideal for this goal because you can’t produce enough power to get rewards. I’d suggest mining ETH or other altcoins which aren’t as popular as BTC. Alternatively, you can think about trading – this approach may be highly profitable if you have enough knowledge and some luck. Just compare potential incomes using crypto calculators (https://cex.io/bitcoin-calculator). Surely, both ways are volatile and nobody can guarantee that you will earn a lot. But I think that mining altcoins or trading is better than mining BTC now.