If Tesla (EM) did not sell all that BTC, then it would be more accurate to say that it is an unrealized profit - and EM has stated that it has no intention of selling that BTC, although this may change at any time. In addition, Tesla appears to have bought a total of 46 000 BTC at an average price of $32 610, but sold 10%, so the total amount of BTC is now 41 400 currently worth 2.375 billion.
In Q4 of last year, Musk purchased $1.5 billion in Bitcoin in one of the most adventurous moves ever undertaken by a corporate treasury. CFO Zach Kirkhorn praised the gambit as "a good place to place some of our cash that's not being used, and get a good return on that." By my math, Tesla bought 46,000 coins at an average price of $32,610. In mid-March, it sold 10% of its holdings, around 4,100 coins, at an average price of almost $60,000, booking a profit of $128 million (reduced to $101 million by an "impairment" charge).
Very accurate.
It is considered as receivables in way that the fruition of profit will only materialize upon the withdrawing/encashment of their BTCs to cash. Until it remains as BTC, it will be unrealized profit just like what you mentioned.
Same as stocks or any receivables- until they are received as cash then it cannot be considered as profit as they will still be recognized as investments or as an asset. Regardless, however, the fact that Tesla has remained faithful in HODLing their BTCs means a lot for the future of cryptocurrencies.