Column not found: 1054 Unknown column 'coin_user.symbol' in 'field list'

We have three models (user - currencies - balances) What should be the relationship of these tables, for example, I want to receive the amount of bitcoin currency of user To do this, I have written the code as follows

this is user table :

Schema::create('users', function (Blueprint $table) {
        $table->bigIncrements('id');
        $table->enum('type', [User::TYPE_ADMIN, User::TYPE_USER])->default(User::TYPE_USER);
        $table->string('name');
        $table->string('email')->unique()->nullable();
        $table->timestamp('email_verified_at')->nullable();
        $table->string('password')->nullable();
        $table->timestamp('password_changed_at')->nullable();
        $table->rememberToken();
        $table->timestamps();
        $table->softDeletes();
    });

coin table:

 Schema::create('coins', function (Blueprint $table) {
        $table->id();
        $table->string('name');
        $table->string('symbol')->unique();
        $table->decimal('buy_percent',6,4)->nullable();
        $table->enum('buy_status' , ['active' , 'inactive'])->default('inactive');
        $table->text('buy_description')->nullable();
        $table->decimal('sell_percent',6,4)->nullable();
        $table->enum('sell_status' , ['active' , 'inactive'])->default('inactive');
        $table->text('sell_description')->nullable();
        $table->timestamps();
    });

and balances table. i include pivot table in this migration:

        Schema::create('balances', function (Blueprint $table) {
            $table->id();
            $table->unsignedBigInteger('user_id');
            $table->unsignedBigInteger('coin_id');
            $table->string('symbol');
            $table->decimal('balance');
            $table->timestamps();
        });
        Schema::create('coin_user', function(Blueprint $table)
        {
            $table->unsignedBigInteger('user_id');
            $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
            $table->unsignedBigInteger('coin_id');
            $table->foreign('coin_id')->references('id')->on('coins')->onDelete('cascade');
        });

And relationships are written that way:

in User model :

    public function coins() {
        return $this->belongsToMany(Coin::class)->withPivot(['symbol', 'balance']);
    }

in Coin model :

    public function users() {
        return $this->belongsToMany(User::class)->withPivot(['symbol', 'balances']);
    }

and Balance model :

    public function coins()
    {
        return $this->belongsToMany(Coin::class , 'balances');
    }

    public function user()
    {
        $this->belongsToMany(User::class , 'balances');
    }

when i run this code:

    $coin = Coin::with('users')->get();
    foreach ($coin as $coin) {
        // $coin here is `BTC`, `ETH`, etc.
        foreach ($coin->users as $user) {
            // $user here is Bob, Mike, etc.
            $user->pivot->balance; // 0.16, etc.
            // Do whatever with `$coin` and `$user`
        }
    }

this error returned for me:

SQLSTATE[42S22]: Column not found: 1054 Unknown column 'coin_user.symbol' in 'field list' (SQL: select users.*, coin_user.coin_id as pivot_coin_id, coin_user.user_id as pivot_user_id, coin_user.symbol as pivot_symbol, coin_user.balances as pivot_balances from users inner join coin_user on users.id = coin_user.user_id where coin_user.coin_id in (1, 2, 3, 4) and users.deleted_at is null)

What is the problem? How can I access users' balances?