$Tesla (TSLA.US)$ Doubled, should I sell or continue to hold? The quantity is not large.

Wat s the diffce between this & $BYD Company ADR (BYDDY.US)$ both in USA?
https://seekingalpha.com/news/3854202-chinese-ev-maker-byd-june-sales-up-224-yy-exceeds-100000-units-for-fourth-consecutive-month
Tesla is no longer the world's biggest electric vehicle maker as the EV pioneer takes a backseat to BYD . The Chinese automaker, which is backed by Warren Buffett, sold 641,350 new energy vehicles in the first six months of 2022, representing a 315% incre...

$Bitcoin (BTC.CC)$ $MicroStrategy (MSTR.US)$ Michael Saylor, Founder and CEO of MicroStrategy, holds more than 17,000 coins and believes they will reach $6 million. Saylor said in the interview that he has never sold any of his bitcoin holdings, and that in general, he doesn't think people should sell theirs. At the height of the dotcom bubble, Saylor once lost $6 billion in one day, so bitcoin's volatility was a piece of cake for him.
Saylor's company, MicroStrategy, currently holds 122,478 bitcoins worth about $6 billion, with an average purchase cost of about $29,861 each.

$Coinbase (COIN.US)$ Factors driving COIN are in uptrend waiting for the same trend here

$Alibaba (BABA.US)$ good luck

$Apple (AAPL.US)$ apple