Yes bitcoin is somewhat the safest. But do note that here in cryptocurrency world no investment is "safe".
Please read about UASF and the August 1st happening because if you are looking to enter and buy some cheap coins this is the right time I will buy some myself at this time as the price is expected to drop. Don't take my words for granted but search and find your own conclusions.

 Also most of the alts are traded only through bitcoin, many merchants accept it and most people think of bitcoin as the only cryptocurrency. In my opinion alts can bring higher returns with higher risk of course. If you are looking to invest in the number 1 rule : Don't invest more than you can afford to lose.

Bitcoin is the original cryptocurrency and exist since 7 years ago. Other cryptocurrencies can be successfull too but Bitcoin will probably be ever more trusted by investors.

It does not prove that bitcoin is stronger than other cryptos moreover, bitcoin has already existed more than 9 years. Bitcoin is the prototype cryptocurrency and therefore, it can not be as strong as other new cryptocurrencies. ethereum, litecoin, zcash are much more stronger than bitcoin You need to spend more time to learn about the crypto currency world

Now you are doing search than you realize bitcoin is best other than crypto currencies.
But about my research all crypto currencies are safest but bitcoin get more attraction because of its price value and secondly bitcoin is the first cyrpto currency that the reason firstly people know about bitcoin and then they also know about other crypto. But i always with bitcoin, so i believe on bitcoin and i also advice you do work with bitcoin, if we want to earn money.

Simply look at the markets. Bitcoin does and always has outperformed every other altcoin by an extreme margin. It isn't even close. I don't think any coin has ever got to even 20% of the value of Bitcoin, at least in the past few years.

The only downside to this is trading isn't as wild. Although it is hard to even say that considering the price regularly fluctuated 5% multiple times every day... compared to other altcoins that is actually a small number, though.

Bitcoin is the safest, most reliable and most convenient in use as it is the pioneer in cryptocurrencies world. Learn more about bitcoin's history and you will notice that after many conspiracies against bitcoin, it still survive and still growing day by day.

Bitcoin has the biggest market cap among the other crypto currencies. That's why bitcoin is stronger than altcoins. It reaches $56 billion as I wrote this message. While at the second place is ETH with $27 billion.

Yes the marketplace of any coin play a very important role for to make that coin a very stronger coin but a long with that it is also important that this coin will have the demand continuous as if the demand will decrease then it will also decrease the marketplace and will make the coin weaker.

It's crazy how powerful the media perception of alternative currencies can influence the way we view and value money.

The great thing about Bitcoin is that it has a ton of media attention already built in from newspapers to TV documentaries to books - there is literally a piece written on everything Bitcoin everywhere you go.

Other cryptocurrencies like Ethereum and Ripple may have a large market cap but they don't quite have the same media attention as BTC and Bitcoin itself.

Take a look at this chart and you'll see just how far ahead Bitcoin is compared to the other alternative currencies in terms of community, public interest and developers. While some currencies may have a great developer community, Bitcoin is strong in all aspects of being a virtual currency.

https://www.coingecko.com/en?sort_by=community_score

I don't see it fading away anytime soon.