Early May, I just arrived overseas for a 2 month holiday when I discovered GPU mining. Very frustrating to not be able to join the lemmings! Anyway, I did some research and it became very clear that the then profitability was a bubble that would burst well before the end of the year. But still I wanted to mine, as a hobby more than anything else. I certainly didn't expect a ROI in 60 or 90 days as many were insisting, but hoped to get to 50% ROI in a few months and 100% in a couple of years.
It was easy to forsee that by the time I got back (end of June), GPUs would be out of stock so I ordered everything I needed from my home country supplier so I could pick them up and build my rig when I came back. I ordered and paid for them and the store assured me they were put aside for me and ready to pick up on my return.
A week before I came back, I contacted the store only to be told of a "global shortage" and my GPUs were somehow no long put aside, (despite my having already paid for them), no longer in stock and no timeframe for when they would be. I got a full refund of course but disappointing that my supplier turned out to be dishonorable and dishonest. Sure enough within a few days, he was showing them in stock but at 50% higher prices than I paid.
But I wasn't too bothered by it as the first signs of the current bear market were visible and it was too late to hope for 50% roi by the end of the year.
I am still planning to be a hobby miner with a 9 GPU rig but will now bide my time until I can pick from the glut of GPUs on ebay for around $50 a piece. Probably end of this year. Mining by then will probably cost more than it makes but still a fun hobby, albeit a loss making one.