Ask yourself if bitcoin is the currency of the future why is the guy who is selling to you parting with his? Especially for filthy fiat? You will be handing 30k to a miner that conjured units of nothing up from thin air because of an "algo".
The time to buy bitcoin was when the market cap was in the low millions, even at low hundreds of millions. Today fully mined supply puts the value at $10-12billion.
You will sleep better having enjoyed the money on something else. You know like something you may actually need and find enjoyment in. Bitcoin has ruined more lives then it has helped.
Am sure he has mentioned its investment money so i dont see it ideal to enjoy the money on something else. Investment is risk therefore its a risk/reward question. If it were me, i would have bought Bitcoin as long as the reward is required in the medium to long term because i am optimistic about the BTC at least testing its previous high before a potential decline or a further surge. I have done trading in the forex market and that is one rule that is 90% likely to be obeyed, a high must be tested again before further decline. I have not really studied much about mining but i think when you buy mining equipment you will know the returns and the timeframe therefore it is rather boring for me to invest in mining and also mining hardware has a lifetime. If you check on ebay, the amount of mining equipment up for sale is just too much and it wont cope with the demands nowadays, which is why i would buy bitcoins.